[9.20] fix: usr: Fix the spurious timeouts while resolving names

Sometimes the loops in the resolving (e.g. to resolve or validate ns1.example.com we need to resolve ns1.example.com) were not properly detected leading to spurious 10 seconds delay.  This has been fixed and such loops are properly detected.

Closes #3033, #5578

Backport of MR !11138

Merge branch 'backport-5578-tracker-parent-fetch-9.20' into 'bind-9.20'

See merge request isc-projects/bind9!11298