Merge branch '457583-enable-custom-dashboards-on-projects-by-default' into 'master'

Enable custom dashboards by default on projects

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/157917



Merged-by: Felipe Artur <fcardozo@gitlab.com>
Approved-by: Serhii Yarynovskyi <syarynovskyi@gitlab.com>
Approved-by: Marc Saleiko <msaleiko@gitlab.com>
Approved-by: Felipe Artur <fcardozo@gitlab.com>
Reviewed-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Reviewed-by: Jiaan Louw <3468028-jiaan@users.noreply.gitlab.com>
Reviewed-by: Max Woolf <mwoolf@gitlab.com>
Reviewed-by: Lorena Ciutacu <lciutacu@gitlab.com>
Reviewed-by: Marc Saleiko <msaleiko@gitlab.com>
Co-authored-by: Jiaan Louw <jlouw@gitlab.com>
Co-authored-by: Jiaan Louw <3468028-jiaan@users.noreply.gitlab.com>