Merge branch '410726-dependency-proxy-for-maven-frontend-changes-query' into 'master'

Implements UI for dependency proxy packages settings

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138938



Merged-by: Justin Ho Tuan Duong <hduong@gitlab.com>
Approved-by: Justin Ho Tuan Duong <hduong@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Reviewed-by: Alper Akgun <aakgun@gitlab.com>
Reviewed-by: Justin Ho Tuan Duong <hduong@gitlab.com>
Reviewed-by: Rahul Chanila <rchanila@gitlab.com>
Co-authored-by: Rahul Chanila <rchanila@gitlab.com>