[rpc] split wallet and non-wallet parts of DescribeAddressVisitor

Summary:
This is a partial backport of Core PR10583 : https://github.com/bitcoin/bitcoin/pull/10583/commits/39633ecd5c18ca29cb551f701e57e8cec3e609da

Depends on D3120, D3129 and D3137

Test Plan:

make check
./test/functional/test_runner.py

Reviewers: #bitcoin_abc, markblundeberg

Reviewed By: #bitcoin_abc, markblundeberg

Differential Revision: https://reviews.bitcoinabc.org/D3138