Pare down create_project_with_auto_devops_spec

What does this MR do?

Pare down the create_project_with_auto_devops_spec by removing superfluous statements and disabling the second branch of the test (this should reduce the testing time for this test by one-half.

What are the relevant issue numbers?

• https://gitlab.com/gitlab-org/gitlab-ce/issues/57921
• https://gitlab.com/gitlab-org/gitlab-ce/issues/57562
• https://gitlab.com/gitlab-org/quality/nightly/issues/71
• https://gitlab.com/gitlab-org/gitlab-ce/issues/57165

Does this MR meet the acceptance criteria?

• [] Changelog entry added, if necessary
• [] Documentation created/updated via this MR
• [] Documentation reviewed by technical writer or follow-up review issue created
• [] Tests added for this feature/bug
• [] Tested in all supported browsers
• [] Conforms to the code review guidelines
• [] Conforms to the merge request performance guidelines
• [] Conforms to the style guides
• [] Conforms to the database guides
• [] Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• [] Security reports checked/validated by reviewer