wallet: Avoid recursive lock in IsTrusted

Summary:
This is a backport of core#19773 [2/2]
https://github.com/bitcoin/bitcoin/pull/19773/commits/772ea4844c34ad70d02fd0bd6c0945baa8fff85c

Backport note: checkFinalTx was replaced by ContextualCheckTransactionForCurrentBlock in D5804

Test Plan:
With TSAN:
ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D10100