[New Data Source]: vault_mounts

[moh2a]

Description

This PR introduces a new Terraform data source vault_mounts that lists all enabled mounts in a Vault instance, including their path, type, description, options, and internal metadata (accessor, uuid, etc.).

Checklist

• Added CHANGELOG entry (only for user-facing changes)
• Acceptance tests where run against all supported Vault Versions

Output from acceptance testing:

$ TESTARGS="--run DataSourceMounts" make testacc
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test --run DataSourceMounts -timeout 30m ./...
?       github.com/hashicorp/terraform-provider-vault   [no test files]
?       github.com/hashicorp/terraform-provider-vault/cmd/coverage   [no test files]
?       github.com/hashicorp/terraform-provider-vault/cmd/generate   [no test files]
ok      github.com/hashicorp/terraform-provider-vault/codegen(cached) [no tests to run]
?       github.com/hashicorp/terraform-provider-vault/helper[no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/consts        [no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/framework/base        [no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/framework/client      [no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/framework/errutil     [no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/framework/model       [no test files]
ok      github.com/hashicorp/terraform-provider-vault/internal/framework/validators  (cached) [no tests to run]
ok      github.com/hashicorp/terraform-provider-vault/internal/identity/entity       (cached) [no tests to run]
?       github.com/hashicorp/terraform-provider-vault/internal/identity/group        [no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/identity/mfa  [no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/pki   [no test files]
ok      github.com/hashicorp/terraform-provider-vault/internal/provider      (cached) [no tests to run]
?       github.com/hashicorp/terraform-provider-vault/internal/provider/fwprovider   [no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/providertest  [no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/rotation      [no test files]
?       github.com/hashicorp/terraform-provider-vault/internal/sync  [no test files]
ok      github.com/hashicorp/terraform-provider-vault/internal/vault/secrets/ephemeral       0.055s [no tests to run]
ok      github.com/hashicorp/terraform-provider-vault/internal/vault/sys     0.056s [no tests to run]
?       github.com/hashicorp/terraform-provider-vault/schema[no test files]
ok      github.com/hashicorp/terraform-provider-vault/testutil       (cached) [no tests to run]
ok      github.com/hashicorp/terraform-provider-vault/util  (cached) [no tests to run]
ok      github.com/hashicorp/terraform-provider-vault/util/mountutil (cached) [no tests to run]
ok      github.com/hashicorp/terraform-provider-vault/vault     1.494s

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PCI review checklist

• I have documented a clear reason for, and description of, the change I am making.

• If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.

• If applicable, I've documented the impact of any changes to security controls.

  Examples of changes to security controls include using new access control methods, adding or removing logging pipelines, etc.

[hashicorp-cla-app]

All committers have signed the CLA.