Merge branch 'mk-enable-claude-2-1-default' into 'master'

Enable by default Claude 2.1 feature flag

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/144030



Merged-by: Alejandro Rodríguez <alejandro@gitlab.com>
Approved-by: Alejandro Rodríguez <alejandro@gitlab.com>
Co-authored-by: Małgorzata Ksionek <mksionek@gitlab.com>

config/feature_flags/development/ai_claude_2_1.yml

 ---
 name: ai_claude_2_1
 introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/139946
-rollout_issue_url:
+rollout_issue_url: https://gitlab.com/gitlab-com/gl-infra/production/-/issues/17472
 milestone: '16.7'
 type: development
 group: group::ai framework
-default_enabled: false
+default_enabled: true