Enable Lint/BooleanSymbol in RuboCop for HAML

What does this MR do?

Enable Lint/BooleanSymbol in RuboCop for HAML.

EE port: !59074 (merged)

Part of #23855

Screenshots (strongly suggested)

n/a

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have not included a changelog entry because ~"technical debt" .
• Code review guidelines
• Style guides
• Separation of EE specific content