net: move the constant maxWait out of InterruptibleRecv()

Summary:
Move maxWait out of InterruptibleRecv() and rename it to
MAX_WAIT_FOR_IO so that it can be reused by other code.

This is a backport of core#20685 [9/20]
https://github.com/bitcoin/bitcoin/pull/20685/commits/34bcfab562bac9887ca9c3831cf4fd0ee7f9814

Depends on D11017

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D11018