vcs_command_alias should be set to "" when vcs_pr_comments_enabled is disabled

[away168]

Describe the bug
In a way while this could be a backend bug, the RnD team has asked to file this with the Provider.

When vcs_pr_comments_enabled is disabled; and the vcs_command_alias is still set - the environment service still thinks that the vcs_pr_comments is enabled and configured. Therefore it generates a "summary" in the git PR

To Reproduce
Create an environment with the provider; set vcs_command_alias="foo" and vcs_pr_comments_enabled=true

Then set vcs_pr_comments_enabled=false

Create a PR.
you'll see a pr_comment "header / summary" in the PR.

Expected behavior
PR Comment header or summary should not be created/added.

Provider Version
1.20.12

Screenshots

Additional context
Add any other context about the problem here.