Fix e2e tests that creates projects vi UI

What does this MR do?

Fix e2e tests that creates projects vi UI when the new experimental project UI feature flag is on.

The new UI was introduced in !32606 (diffs) and was recently turned on in staging causing existing end-to-end tests to break: #222471 (closed).

The change in this MR will check if the test is on the new project experimental UI page and perform the appropriate action.

Closes: #222471 (closed)

Conformity

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

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• [-] Label as security and @ mention @gitlab-com/gl-security/appsec
• [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• [-] Security reports checked/validated by a reviewer from the AppSec team