HostFilter Not Used for Control Connection

[amcrn]

What version of Cassandra are you using?

Reproducible on 3.x & 4.x

What version of Gocql are you using?

v1.6.0

What version of Go are you using?

1.20

What did you do?

The HostFilter is not being used for the Control Connection (aka
the controlConn). This can be problematic, especially if the host
is being filtered due to it being in a bad state, as it can hold up
the creation of the Control Connection (and therefore the Session
itself) for quite some time.

What did you expect to see?

Hosts filtered by a HostFilter are not eligible to be used in the
Control Connection.

What did you see instead?

The opposite.

Note: This also fixes an issue if disableControlConn=true and/or DisableInitialHostLookup=true, where the Ring is updated with the host, prior to filtering:

gocql/session.go

Lines 265 to 268 in db6d556

	host := s.ring.addOrUpdate(host)
	if s.cfg.filterHost(host) {
	continue
	}