Add alert to warn users about using a period in a Terraform state name

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What does this MR do and why?

Add an alert to warn users about using a period in a Terraform state name

Update related spec files

Update pot file

Closes: #389548 (closed)

Changelog: added

Screenshots or screen recordings

Before	After
	terraform_state_after.mov

How to set up and validate locally

1. Run gdk or use GitLab.
2. Create a project with a Terraform state (make sure you have access to the Terraform state).
3. Visit the project's main view page.
4. Review result. An alert should be shown.
5. After dismiss the alert is never shown.