Templates list is empty for users that only authorized with a GitLab

[gtsiolis]

Problem to solve

The new modal for workspace templates list shows up empty for users that only authorized with a GitLab.

Originally posted by @gtsiolis in #3521 (comment)

[svenefftinge]

We should add a few gitlab examples to the DB.

[gtsiolis]

Reposting from #2409 (comment):

Although, this part of the dashboard will probably become better in the near future, could we simply mirror or manually push all project templates to all git providers to resolve this?

1. We do have a profile on all git providers[1][2][3] but could use a new one to host project templates if needed.
2. GitLab already supports repository mirroring. Alternatively we could use Cloud Source Repositories or a GitHub action (like this).

[stale]

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