validation: include block hash when reporting prev block not found errors

Summary:
This is a backport of core#23235 [1/4]
https://github.com/bitcoin/bitcoin/pull/23235/commits/1d7d835ec3a7cc17924f80222784fe3afb567b67

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D12038