Fix Hostname CLUSTER MEET

[vazois]

This PR fixes #1042. In hindsight, it fixes also #1036 as now users should be able to use localhost in CLUSTER MEET.
The fix probes all IP addresses returned by Dns.GetHostEntry to see which one is actively listening on the corresponding port.

This PR adds the following

• Allow support of hostnames when calling cluster meet
• Allow for Garnet to bind to a hostname with --bind option

NOTES:

1. It seems CLUSTER MEET accepts only IP address and not hostnames
2. After Redis version 6.2, redis-cli will perform hostname resolution and issue CLUSTER MEET to a specific address, while for version 6.2 and earlier (did not test it for previous versions but I assume it holds) it will not resolve the hostname. Similarly, the redis server cannot be bound to a hostname using bind option in the configuration.
3. Currently, Garnet did not support binding on a hostname.