🌱 Override disk promo mode

[akutz]

What does this PR do, and why is it needed?

This patch allows the value of a VM's spec.promoDisksMode to be globally overriden via the env var PROMOTE_DISKS_MODE.

Which issue(s) is/are addressed by this PR? (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):

Fixes NA

Are there any special notes for your reviewer:

Please add a release note if necessary:

NONE

[github-actions]

Package	Line Rate	Health
github.com/vmware-tanzu/vm-operator/controllers/contentlibrary/clustercontentlibraryitem	100%	✔
github.com/vmware-tanzu/vm-operator/controllers/contentlibrary/contentlibraryitem	100%	✔
github.com/vmware-tanzu/vm-operator/controllers/contentlibrary/utils	46%	❌
github.com/vmware-tanzu/vm-operator/controllers/infra/capability/configmap	92%	✔
github.com/vmware-tanzu/vm-operator/controllers/infra/capability/crd	100%	✔
github.com/vmware-tanzu/vm-operator/controllers/infra/configmap	75%	❌
github.com/vmware-tanzu/vm-operator/controllers/infra/node	77%	❌
github.com/vmware-tanzu/vm-operator/controllers/infra/secret	76%	❌
github.com/vmware-tanzu/vm-operator/controllers/infra/validatingwebhookconfiguration	85%	➖
github.com/vmware-tanzu/vm-operator/controllers/infra/zone	73%	❌
github.com/vmware-tanzu/vm-operator/controllers/storageclass	95%	✔
github.com/vmware-tanzu/vm-operator/controllers/storagepolicyquota	98%	✔
github.com/vmware-tanzu/vm-operator/controllers/util/encoding	73%	❌
github.com/vmware-tanzu/vm-operator/controllers/virtualmachine/storagepolicyusage	97%	✔
github.com/vmware-tanzu/vm-operator/controllers/virtualmachine/virtualmachine	69%	❌
github.com/vmware-tanzu/vm-operator/controllers/virtualmachine/volume	87%	➖
github.com/vmware-tanzu/vm-operator/controllers/virtualmachineclass	73%	❌
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinegroup	90%	✔
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinegrouppublishrequest	88%	➖
github.com/vmware-tanzu/vm-operator/controllers/virtualmachineimagecache	88%	➖
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinepublishrequest	81%	➖
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinereplicaset	67%	❌
github.com/vmware-tanzu/vm-operator/controllers/virtualmachineservice	82%	➖
github.com/vmware-tanzu/vm-operator/controllers/virtualmachineservice/providers	92%	✔
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinesetresourcepolicy	81%	➖
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinesnapshot	91%	✔
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinewebconsolerequest	72%	❌
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinewebconsolerequest/v1alpha1	72%	❌
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinewebconsolerequest/v1alpha1/conditions	88%	➖
github.com/vmware-tanzu/vm-operator/controllers/virtualmachinewebconsolerequest/v1alpha1/patch	78%	❌
github.com/vmware-tanzu/vm-operator/pkg/bitmask	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/builder	97%	✔
github.com/vmware-tanzu/vm-operator/pkg/conditions	90%	✔
github.com/vmware-tanzu/vm-operator/pkg/config	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/config/capabilities	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/config/env	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/context/generic	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/context/operation	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/errors	83%	➖
github.com/vmware-tanzu/vm-operator/pkg/exit	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/mem	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/patch	78%	❌
github.com/vmware-tanzu/vm-operator/pkg/prober	91%	✔
github.com/vmware-tanzu/vm-operator/pkg/prober/probe	90%	✔
github.com/vmware-tanzu/vm-operator/pkg/prober/worker	77%	❌
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere	75%	❌
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/clustermodules	73%	❌
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/config	88%	➖
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/contentlibrary	62%	❌
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/credentials	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/network	81%	➖
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/placement	74%	❌
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/session	44%	❌
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/storage	44%	❌
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/sysprep	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/upgrade/virtualmachine	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/vcenter	85%	➖
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/virtualmachine	82%	➖
github.com/vmware-tanzu/vm-operator/pkg/providers/vsphere/vmlifecycle	62%	❌
github.com/vmware-tanzu/vm-operator/pkg/record	87%	➖
github.com/vmware-tanzu/vm-operator/pkg/topology	91%	✔
github.com/vmware-tanzu/vm-operator/pkg/util	84%	➖
github.com/vmware-tanzu/vm-operator/pkg/util/cloudinit	89%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/cloudinit/validate	91%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/image	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/kube	89%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/kube/cource	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/kube/internal	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/kube/proxyaddr	73%	❌
github.com/vmware-tanzu/vm-operator/pkg/util/kube/spq	99%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/netplan	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/ovfcache	75%	❌
github.com/vmware-tanzu/vm-operator/pkg/util/ovfcache/internal	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/paused	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/ptr	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/resize	98%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/vmopv1	87%	➖
github.com/vmware-tanzu/vm-operator/pkg/util/vsphere/client	66%	❌
github.com/vmware-tanzu/vm-operator/pkg/util/vsphere/library	96%	✔
github.com/vmware-tanzu/vm-operator/pkg/util/vsphere/vm	79%	❌
github.com/vmware-tanzu/vm-operator/pkg/util/vsphere/watcher	85%	➖
github.com/vmware-tanzu/vm-operator/pkg/vmconfig	95%	✔
github.com/vmware-tanzu/vm-operator/pkg/vmconfig/anno2extraconfig	100%	✔
github.com/vmware-tanzu/vm-operator/pkg/vmconfig/bootoptions	97%	✔
github.com/vmware-tanzu/vm-operator/pkg/vmconfig/crypto	91%	✔
github.com/vmware-tanzu/vm-operator/pkg/vmconfig/diskpromo	88%	➖
github.com/vmware-tanzu/vm-operator/pkg/webconsolevalidation	100%	✔
github.com/vmware-tanzu/vm-operator/services/vm-watcher	94%	✔
github.com/vmware-tanzu/vm-operator/webhooks/common	100%	✔
github.com/vmware-tanzu/vm-operator/webhooks/persistentvolumeclaim/validation	95%	✔
github.com/vmware-tanzu/vm-operator/webhooks/unifiedstoragequota/validation	90%	✔
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachine/mutation	87%	➖
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachine/validation	96%	✔
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachineclass/mutation	62%	❌
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachineclass/validation	89%	➖
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinegroup/mutation	87%	➖
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinegroup/validation	90%	✔
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinepublishrequest/validation	92%	✔
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinereplicaset/validation	90%	✔
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachineservice/mutation	67%	❌
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachineservice/validation	92%	✔
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinesetresourcepolicy/validation	89%	✔
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinesnapshot/validation	89%	✔
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinewebconsolerequest/v1alpha1/validation	92%	✔
github.com/vmware-tanzu/vm-operator/webhooks/virtualmachinewebconsolerequest/validation	92%	✔
Summary	81% (13220 / 16367)	➖

Minimum allowed line rate is 79%