chg: usr: Improve output of 'rndc dnssec -status'

Add a new parameter ``-v`` to the ``rndc dnssec -status`` command for more verbose output. Previously, key states were printed, and keys that can be purged were listed. This made the output hard to read. This information is now only shown in the verbose output.

Add more meaningful messages to the status output, making it clearer what the state of a rollover is.

This makes the output more condense, improving its readability.

Closes #3938

Merge branch '3938-improve-rndc-dnssec-status-output' into 'main'

See merge request isc-projects/bind9!11099