res_pjsip_transport_websocket: Also set the remote name.

As part of PJSIP 2.11 a behavior change was done to require
a matching remote hostname on an established transport for
secure transports. Since the Websocket transport is considered
a secure transport this caused the existing connection to not
be found and used.

We now set the remote hostname and the transport can be found.

ASTERISK-30065

Change-Id: Ia1cdef33e1411f927985b4b852c95e163c080e94
(cherry picked from commit f01ce810)