rem: usr: Remove "port" from source address options

Remove the use of "port" when configuring query-source(-v6),
transfer-source(-v6), notify-source(-v6), parental-source(-v6),
etc. Remove the use of source ports for parental-agents.

Also remove the deprecated options use-{v4,v6}-udp-ports and
avoid-{v4,v6}udp-ports.

Closes #3843

Merge branch '3843-remove-deprecated-source-port-options' into 'main'

See merge request isc-projects/bind9!9469