Adds support for resolving multiple host IPs

[cgranleese-r7]

This PR updates the Mettle Meterpreter to now support resolving multiple IPs. Previously resolve_host and resolve_hosts would only resolve a single IP per host. Now they will resolve each IP per host.

This is achieved by now having packing TLV_TYPE_IP and TLV_TYPE_ADDR_TYPE into a TLV_META_TYPE_GROUP TLV called TLV_TYPE_RESOLVE_HOST_ENTRY.

To ensure this is backwards compatible, we will be updating the Metasploit-Framework side of things to check for both the now TLV type as well as the old TLVs.

This is part of a larger effort to update all Meterpreter implementations:
Updating other Meterpreter implementations:

• PHP and Python: Adds support for resolving multiple host ips metasploit-payloads#681
• Java: Tweak java meterpreter to resolve multiple ips per host metasploit-payloads#683
• Windows C: Working IPv4 & IPv6 DNS resolution for single and multiple hosts metasploit-payloads#684

Metasploit Framework PR:

• Adds support for resolving multiple host ips metasploit-framework#18499

Verification

• Follow the updated README.md to get a session.
• Run the following command and ensure IPV4 addresses are being resolved: irb -e "puts(framework.sessions.values.last.net.resolve.resolve_host 'google.com')"
• Run the following command and ensure IPV4 addresses are being resolved: irb -e "puts(framework.sessions.values.last.net.resolve.resolve_host 'google.com', 23)"