Create GitLab and BitBucket mirrors of the example repos.

[daavoo]

Would be good to find an easy way to also force-push the generated repos to GitLab and BitBucket

[dberenbaum]

I'm looking into at least creating and running a GitLab pipeline as a first step

[dberenbaum]

For model registry scenarios, I think this becomes more important. Having gitlab and bitbucket deployment pipelines would be really nice to show how to use the model registry there, and we could include tabs in the docs for different git providers.

cc @tibor-mach