This commit adds the missing functionality to access a Git repository
per HTTPS by authenticating using a group level bot build token. Prior
to this this, trying to access a Git repository with said token would
lead to an authentication error. Accessing Git repositories using
project level bot build tokens worked perfectly fine, but the same
check for group level bots was missing. This access scenario occurs
if a group level bot (group level access token) is used to trigger
a CI pipeline (e.g. pipeline trigger API) and the CI job tries to
clone the desired repository.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/345543

Changelog: fixed