Merge branch 'sh-remove-deprecation-warnings-from-com' into 'master'

Conditionally enable deprecation log messages

Closes #46158 and gitlab-com/infrastructure#4228

See merge request gitlab-org/gitlab-ce!18997

config/initializers/deprecations.rb

-if Gitlab.dev_env_or_com?
+if Rails.env.development? || ENV['GITLAB_LEGACY_PATH_LOG_MESSAGE']
   deprecator = ActiveSupport::Deprecation.new('11.0', 'GitLab')
 
   deprecator.behavior = -> (message, callstack) {