Git URL field does not work for GitLab SSH URLs

Description of problem:

The git URL field does not validate gitlab SSH URLs.

Prerequisites (if any, like setup, operators/versions):

None

Steps to Reproduce

1. Navigate to +Add > Import from Git
2. Enter any GitLab SSH URL (eg. git@gitlab.com:rh_tam_public/nodejs-ex.git)

Actual results:

The field is stuck in "Validating..." and the repository is not validated.

Expected results:

The repository should be properly validated, similar to HTTP URLs.

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details:

4.8.0-0.nightly-2021-06-13-101614