net_processing: Pass a Peer& to ProcessOrphanTx

Summary:
Partial backport of core#26295:
https://github.com/bitcoin/bitcoin/pull/26295/commits/9910ed755c3dfd7669707b44d993a20030dd7477

Depends on D16228.

Test Plan:

ninja all check-all

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D16229