bench: Add Muhash benchmarks

Summary:
Co-authored-by: Pieter Wuille <pieter.wuille@gmail.com>

This is a partial backport of core#19055
https://github.com/bitcoin/bitcoin/pull/19055/commits/c1225273857f9fa2e2276396e3f8b3ea48306df3

Depends on D11150

Test Plan: ninja bench-bitcoin

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D11153