Zebra: Cleanup RIB debugs

Zebra: Cleanup RIB debugs

Some of the changes include:
- ensuring IPv6 addresses are printed correctly
- say 'updating' or 'deleting' etc. only when that is actually done
- say 'queuing' or 'dequeuing' only when that is actually done
- print useful info for 'detailed' debug - that now subsumes 'rib queue'
- delete various useless logs
- VRF-specific - print VRF id in RIB debugs prior to prefix
  (e.g., 4:37.1.1.0/28)

Ticket: CM-8110
Reviewed By: CCR-3765
Testing Done: Manual testing (2.5-br)