New generic `Address` type in rust-bitcoin 0.30.0

[thunderbiscuit]

This issue is to keep track of the discussion around how we should expose the new Address<NetworkChecked> and Address<NetworkUnchecked> from rust-bitcoin >0.30.0.

Related links:
issue: rust-bitcoin/rust-bitcoin#1460
pr: rust-bitcoin/rust-bitcoin#1489

[reez]

Lets maybe chat about this on Bindings call because I remember this discussion a year ago, and was wondering if we had any new thoughts related to this that we should add to issue