Add API endpoint to refresh a project statistics

What does this MR do?

Add API endpoint to refresh a project statistics. Available for only admins.

For performance reasons, a project statistics is cached and it may not return accurate values. You can use this endpoint to get more accurate project statistics.

Note: This endpoint does not refresh job_artifacts_size, because there is a issue to recalculate it.

What are the relevant issue numbers?

#29288 (moved) #43765 (closed) #44726 (closed) #49368 (moved) #57640 (closed)

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides
• Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
• Security reports checked/validated by reviewer