Create a new project for each spec and for each retry

What does this MR do?

Fixes a problem where after a 1st try failure, the test would try to find export_project_link but couldn't because the project had already been exported. With this fix, a new project will be created for each retry (and for each test within this file).

Closes #35602 (closed)

Conformity

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