build: remove boost::filesystem and boost::system usages

Summary:
This concludes backport of core#20744
https://github.com/bitcoin/bitcoin/pull/20744/commits/b87f9c5edf3895df9650131fcf8551c3ad1d7301
https://github.com/bitcoin/bitcoin/pull/20744/commits/07269321f38e46e9e02f16d7cd135ea90692638d

Depends on D11974

Test Plan: CI builds

Reviewers: #bitcoin_abc, sdulfari

Reviewed By: #bitcoin_abc, sdulfari

Differential Revision: https://reviews.bitcoinabc.org/D12608