Fix Style/RedundantParentheses offenses in HAML files

What does this MR do and why?

This MR fixes all HAML lint TODOs by fixing related RuboCop offenses. .haml-lint_todo.yml is regenerated.

Follow-up of !96880 (merged).

How to set up and validate locally

REVEAL_RUBOCOP_TODO=0 bundle exec haml-lint --parallel {,ee/}app/views

1991 files inspected, 0 lints detected

MR acceptance checklist

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