Support IPv6 (at least on select espressif devices)

[jepler]

see what changes are needed at the socketpool or wifi level. v6 support will be optional. needs to support tcp & udp

[jepler]

I'll be keeping my work in a branch https://github.com/adafruit/circuitpython/compare/main...jepler:circuitpython:veesix?expand=1

ipv6 addresses can now be resolved by getaddrinfo.

[jepler]

done in #9436