Enable workspace testing in MRs by utilising the CNG instance
Currently the first e2e test of workspaces is performed in staging. Currently in every MR, the e2e tests are run against a CNG instance of gitlab which uses the [GitLab Helm chart](https://docs.gitlab.com/charts/) -> https://docs.gitlab.com/development/testing_guide/end_to_end/test_pipelines/#e2etest-on-cng
This test suite blocks MRs. We could extend the [cng orchestration tool ](https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/gems/gitlab-cng/README.md) to [configure workspaces](https://docs.gitlab.com/user/workspace/configuration/#set-up-workspace-infrastructure) and then execute the existing workspaces e2e test against it, this would give ~"group::remote development" engineers earlier feedback on ~"Category:Workspaces" changes.
issue