Documentation update for running the workspaces e2e spec

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The following places needs to be updated:

https://gitlab.com/gitlab-org/remote-development/gitlab-remote-development-docs/-/blob/main/doc/local-development-environment-setup.md#run-e2e-spec-locally

https://docs.gitlab.com/ee/development/testing_guide/end_to_end/test_infrastructure.html