Merge branch '424759/Remove_feature_flag' into 'master'

Remove feature flag introduce_ci_max_total_yaml_size_bytes

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/131397



Merged-by: Furkan Ayhan <furkanayhn@gmail.com>
Approved-by: Furkan Ayhan <furkanayhn@gmail.com>
Co-authored-by: Kasia Misirli <kmisirli@gitlab.com>