v7.4.1

Changelog

• Fix the issue where Pelican won't exit main process if error group goroutine returns error, unless an error returns in the main goroutine
• Fix the panic at the director when a cache advertise itself to the director, as we didn't have the case for cache when doing version compatibility check
• Improve logging at program exit to be consistent.
• Improve cache error group, remove duplicated exit handler that root.go already had.