Merge branch 'jarka_ff_update' into 'master'

Add additional info to allow_possible_spam feature flag

See merge request gitlab-org/gitlab!43142

config/feature_flags/development/allow_possible_spam.yml

 ---
 name: allow_possible_spam
-introduced_by_url: 
-rollout_issue_url: 
-group: 
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/17604
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/29830
+group: group::portfolio management
 type: development
 default_enabled: false