Update 'gitlab_project' to support the update 'public_jobs' attribute

Changelog

• Added the public_jobs attribute.
• Deprecated the public_builds attribute.
• Marked the public_jobs and public_builds attributes as conflicting.
• Updated CRUD logic to ignore the public_builds attribute when the public_jobs attribute is present.
• Added/updated the following tests:
  • Added a test to test the public_jobs attribute without the public_builds attribute.
  • Added a test to test the public_jobs attribute with the public_builds attribute.
  • Updated the broken tests after the public_jobs attribute was added.

Closes #1339 (closed)