scripted-diff: Rename CAddrMan to AddrMan

Summary:
Partial backport of core#22950:
https://github.com/bitcoin/bitcoin/pull/22950/commits/dd8f7f250095e58bbf4cd4effb481b52143bd1ed

Depends on D12336.

There is no change in behavior.

Test Plan:

ninja all check-all
ninja bitcoin-fuzzers
ninja bench-bitcoin

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D12337