vmseries: enhance KMS key usage

[migara]

• Change variable from ebs_kms_key_id to ebs_kms_key_alias
• Simplify the kms_key selection logic
• Add an HCL snippet of the usage of a custom KMS key to an example

[github-actions[bot]]

:tada: This issue has been resolved in version 0.3.0 :tada:

The release is available on Terraform Registry and GitHub release

Posted by semantic-release bot