[VSA][FE] Migrate the project-level navigation to the path navigation layout

What does this MR do?

This MR is part of an effort to implement group level VSA features at the project level.

This MR:

• Adds the path flow navigation to project-level value stream analytics. The path flow is implemented on group level VSA, so we can reuse the existing components.
• Moves the path navigation component from ee/ to app/
• Adds a base_spec for project VSA to test the rendered page
• Updates related tests

The existing (horizontal) navigation will be removed from the stage table and the stage table columns adjusted to cater for the changes.

Notes:

• Project VSA does not require an overview section at the moment
• The updated stage table has not been implemented on a group level yet

Screenshots (strongly suggested)

Before	After

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

Related to #326695 (closed)