Fix ip restricted ssh access e2e spec

What does this MR do?

Fixes ip restricted ssh access e2e spec by adding user to project and using the user's access token to create the ssh key. Also, does some minor cleanup.

Closes: #220962 (closed)

Conformity

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