Merge branch '331741-backend' into 'master'

Add support for credentials in the dependency proxy for containers

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/182748



Merged-by: Prabakaran Murugesan <pmurugesan@gitlab.com>
Approved-by: Lysanne Pinto <lpinto@gitlab.com>
Approved-by: Max Orefice <morefice@gitlab.com>
Approved-by: Prabakaran Murugesan <pmurugesan@gitlab.com>
Approved-by: Adie (she/her) <avpfestin@gitlab.com>
Approved-by: Rémy Coutable <remy@rymai.me>
Reviewed-by: Rémy Coutable <remy@rymai.me>
Reviewed-by: David Fernandez <dfernandez@gitlab.com>
Reviewed-by: Max Orefice <morefice@gitlab.com>
Reviewed-by: Prabakaran Murugesan <pmurugesan@gitlab.com>
Reviewed-by: Radamanthus Batnag <rbatnag@gitlab.com>
Reviewed-by: Lysanne Pinto <lpinto@gitlab.com>
Co-authored-by: Dzmitry Meshcharakou <12459192-dmeshcharakou@users.noreply.gitlab.com>
Co-authored-by: David Fernandez <dfernandez@gitlab.com>