Update test_valid_connection_strings test to only use valid mixed environment format

There is a typo in the connection string RFC examples and those valid connection strings were copied over for the parameters used in the connection_t::test_valid_connection_strings test. While looking into Python 3.11 support I noticed the test failing and tracked it down to a change in Python 3.11.4 (references below). This ticket is to log the small change in the mixed IPv6 and IPv4 connection strings to have a colon between the hex (IPv6) and decimal (IPv4) instead of a period.

change:

couchbases://[::ffff.192.168.0.1]:11207,[::ffff.192.168.0.2]:11207

to:

couchbases://[::ffff:192.168.0.1]:11207,[::ffff:192.168.0.2]:11207

• Python 3.11.4 changes
• urlparse change
• RFC 4291 Section 2.2