[net processing] Make RelayAddress() a member function of PeerManagerImpl
[net processing] Make RelayAddress() a member function of PeerManagerImpl

Summary:
This is a backport of [[https://github.com/bitcoin/bitcoin/pull/21186 | core#21186]] [2/5]
https://github.com/bitcoin/bitcoin/pull/21186/commits/caba7ae8a505a4b4680a9d7618f65c4e8579a1e2

Depends on D10927

Test Plan: `ninja all check-all`

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D10928

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