PR description:
> This change removes some unlock/lock and lock/lock cases regarding GetWalletTx and IsMine overloads.
This is a backport of [[https://github.com/bitcoin/bitcoin/pull/19289 | core#19289]] [1/3]
https://github.com/bitcoin/bitcoin/pull/19289/commits/a13cafc6c6998baedf3c5766259c21fcd763b99e