Merge branch 'ankit.panchal/pseudonymise-username' into 'master'

Pseudonymise username in urls

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/183474



Merged-by: Vitali Tatarintev <vtatarintev@gitlab.com>
Approved-by: Niko Belokolodov <nbelokolodov@gitlab.com>
Approved-by: Vitali Tatarintev <vtatarintev@gitlab.com>
Co-authored-by: ankit.panchal <apanchal@gitlab.com>