new: usr: dig can now display the received BADVERS message during negotiation

Dig +showbadvers now displays the received BADVERS message and
continues the EDNS version negotiation.  Previously to see the
BADVERS message +noednsneg had to be specified which terminated the
EDNS negotiation.  Additionally the specified EDNS value (+edns=value)
is now used when making all the initial queries with +trace. i.e EDNS
version negotiation will be performed with each server when performing
the trace.

Closes #5234

Merge branch '5234-have-dig-display-the-badvers-message' into 'main'

See merge request isc-projects/bind9!10234