Specify paths for GHA

[ansermino]

Summary of changes

Changes introduced in this pull request:

• Skip tests/checks/docker if only files in docs/ have changed
• Only run code linters if Rust files are changed

Note: I believe this closes #4721. Please consider any other changes that might be relevant and not addressed in this PR.

Reference issue to close (if applicable)

Closes #4721

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.