move-only: Add util/hash_type

Summary:
Can be reviewed with --color-moved=dimmed-zebra

This is a partial backport of core#21584
https://github.com/bitcoin/bitcoin/pull/21584/commits/faa921f78788be0f236c6b10ed3f92dcf148d1cb

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D11330