chore: apply terraform fmt to all examples

[sorccu]

Currently, examples are not formatted with terraform fmt, which makes further tooling changes annoying.

This PR applies proper formatting to examples, and adds a new GitHub workflow that comments on PRs that change Terraform files with the result of terraform fmt and reports a failing check. I have tested the workflow by pushing commits with incorrect formatting (and then removing those commits again which is why they cannot be seen).

Affected Components

• Resources
• Test
• Docs
• Tooling
• Other

Pre-Requisites

• Terraform code is formatted with terraform fmt
• Go code is formatted with go fmt
• plan & apply command of demo/main.tf file do not produce diffs

Notes for the Reviewer

Resolves #[issue-number]

New Dependency Submission

[github-actions]

Terraform Format and Style 🖌success

Format Output