A memory resource similar to std::pmr::unsynchronized_pool_resource, but
optimized for node-based containers.
Co-Authored-By: Pieter Wuille <pieter@wuille.net>
This is a partial backport of core#25325
https://github.com/bitcoin/bitcoin/pull/25325/commits/b8401c3281978beed6198b2f9782b6a8dd35cbd7
with ARM fixes from
https://github.com/bitcoin/bitcoin/pull/28913/commits/ce881bf9fcb7c30bb1fafd6ce38844f4f829452a