Add Jekyll GitLab Pages E2E smoke spec

What does this MR do?

Adds a Smoke spec for ~"group::release management" Category:Pages.

• Log into GitLab
• Create a Project using the "jekyll" template
• Fire a Pipeline for the Project
• Test that the pipeline has a pages job, and waits for that job to pass.

Rel: gitlab-org/quality/testcases#877 (closed)

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• [-] Database guides
• [-] Separation of EE specific content

Availability and Testing

This test may be long-running for a smoke test. We may consider only the first expectation of ensuring that the Job creates, not necessarily caring that it succeeds.