Fix Rails/SaveBang offenses for qa/qa/specs/features

What does this MR do and why?

This MR aims to solve the issue #220040 (closed)

File Change

• .rubocop_todo/rails/save_bang.yml
• qa/qa/specs/features/browser_ui/3_create/repository/push_mirroring_lfs_over_http_spec.rb
• qa/qa/specs/features/browser_ui/3_create/repository/push_mirroring_over_http_spec.rb
• qa/qa/specs/features/ee/browser_ui/3_create/repository/pull_mirroring_over_http_spec.rb
• qa/qa/specs/features/ee/browser_ui/3_create/repository/pull_mirroring_over_ssh_with_key_spec.rb

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.