Enable project studio E2E tests

What does this MR do and why?

• Enable the E2E tests to run against the new Project Studio UI.
• Create an additional E2E test pipeline against the GDK for MRs with Project Studio label
• Quarantine E2E tests in this pipeline which are broken due to bugs

Pipeline without Project Studio : https://gitlab.com/gitlab-org/gitlab/-/pipelines/2039291582 (no project studio e2e pipeline)

Pipeline with Project Studio : https://gitlab.com/gitlab-org/gitlab/-/pipelines/2039346218 (project studio e2e pipeline present)

References

• https://gitlab.com/groups/gitlab-org/quality/test-governance/-/epics/3
• Resolves https://gitlab.com/gitlab-org/quality/quality-engineering/team-tasks/-/issues/3878

How to set up and validate locally

Will use the new UI:

QA_PROJECT_STUDIO=true QA_GITLAB_URL=https://gdk.test:3443 bundle exec rspec qa/specs/features/browser_ui/10_software_supply_chain_security/login/oauth_login_with_github_spec.rb

Bugs discovered doing this MR

• https://gitlab.com/gitlab-org/gitlab/-/issues/567702#note_2746850730
• https://gitlab.com/gitlab-org/gitlab/-/issues/567702#note_2743782125
• https://gitlab.com/gitlab-org/gitlab/-/issues/567702#note_2743596081

These tests have been quarantined against the project studio job.

MR acceptance checklist

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