Merge branch '406761_correct_rubocop_for_mr_spec' into 'master'

Fix RSpec/UselessDynamicDefinition for merge_request_spec.rb

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/118014



Merged-by: Tetiana Chupryna <tchupryna@gitlab.com>
Approved-by: Tetiana Chupryna <tchupryna@gitlab.com>
Co-authored-by: Vasilii Iakliushin <viakliushin@gitlab.com>