The member is unrelated to block storage (BlockManager). It is related
to validation.
Fix the confusion by moving it.
Can be reviewed with
--color-moved=dimmed-zebra --color-moved-ws=ignore-all-space
This is a partial backport of core#23785
https://github.com/bitcoin/bitcoin/pull/23785/commits/facd2137eceacb95e1f71c87ddc704d752b37272
Depends on D12485