Merge branch 'otovar/remove-continuous-container-scanning-ff' into 'master'

Remove container_scanning_continuous_vulnerability_scans flag

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/150593



Merged-by: Avielle Wolfe <awolfe@gitlab.com>
Approved-by: Missy Davies <mdavies@gitlab.com>
Approved-by: Avielle Wolfe <awolfe@gitlab.com>
Reviewed-by: Missy Davies <mdavies@gitlab.com>
Co-authored-by: Oscar Tovar <otovar@gitlab.com>