Merge branch 'ph/defaultSubmitReviewComment' into 'master'

Enables mr_review_submit_comment by default

See merge request gitlab-org/gitlab!94208

config/feature_flags/development/mr_review_submit_comment.yml

@@ -5,4 +5,4 @@ rollout_issue_url:
 milestone: '15.1'
 type: development
 group: group::code review
-default_enabled: false
+default_enabled: true