Enable HAML-LINT linters phase 2

What does this MR do?

Enables phase 2 HAML linters.

• UnnecessaryInterpolation
• UnnecessaryStringOutput
• RubyComments
• MultilinePipe

Are there points in the code the reviewer needs to double check?

Nope

Why was this MR needed?

See #22072 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• Squashed related commits together

What are the relevant issue numbers?

Closes #22072 (closed)