Support `SecurityGroupName` field in `TargetGroupBinding`

[cairinmisa]

Describe the feature you are requesting

Motivation
This is a QoL feature request which would allow users to specify a Security Group for their TargetGroupBinding via the Security Group Name. This can be useful for users who have multiple accounts and clusters with consistent resource(s). By using the name we would be able to easily lift and shift these deployments between accounts.

Describe the proposed solution you'd like
Similar to the function of getTargetGroupsByNameFromAWS in targetgroup_helper.go, we could have a function that retrieves the Security Group by name. This should be possible as you can filter on Group Names in the DescribeSecurityGroups API.

Describe alternatives you've considered
N/A.

Contribution Intention (Optional)

-[X] Yes, I am willing to contribute a PR to implement this feature
-[ ] No, I cannot work on a PR at this time

[mohsinfoxtel]

Thanks @cairinmisa for raising this up. Much needed one

[zac-nixon]

Thanks for the suggestion! Please let us know if you need help with getting the CR tested.