Update feature flag ownership and rollout issues

config/feature_flags/development/allow_unsafe_ruby_regexp.yml

 ---
 name: allow_unsafe_ruby_regexp
 introduced_by_url: 
-rollout_issue_url: 
-group: 
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/257849
 type: development
+group: group::continuous integration
 default_enabled: false

config/feature_flags/development/ci_disable_validates_dependencies.yml

 ---
 name: ci_disable_validates_dependencies
-introduced_by_url: 
-rollout_issue_url: 
-group: 
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/14009
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/257847
+group: group::continuous integration
 type: development
 default_enabled: false