Merge branch '424374-add-graphql-mutation-to-toggle-cvs' into 'master'

Add a graphql mutation for toggling cvs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/131450



Merged-by: charlie ablett <cablett@gitlab.com>
Approved-by: Ross Byrne <robyrne@gitlab.com>
Approved-by: Ryan Cobb <rcobb@gitlab.com>
Approved-by: charlie ablett <cablett@gitlab.com>
Reviewed-by: charlie ablett <cablett@gitlab.com>
Reviewed-by: Igor Frenkel <ifrenkel@gitlab.com>
Co-authored-by: Igor Frenkel <ifrenkel@gitlab.com>