Remove use of RSPEC_ALLOW_INVALID_URLS

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/170787



Merged-by: Marc Saleiko <msaleiko@gitlab.com>
Approved-by: Marc Saleiko <msaleiko@gitlab.com>
Approved-by: Kevin Morrison <kmorrison@gitlab.com>
Reviewed-by: Matthias Käppler <mkaeppler@gitlab.com>
Reviewed-by: Marc Saleiko <msaleiko@gitlab.com>
Co-authored-by: Matthias Kaeppler <mkaeppler@gitlab.com>