[backport#15288] Remove uses of CheckFinalTx in wallet code

Summary:
80f52a2267f44a9cae4440615df3ff989be1579c This commit does not change behavior. (Russell Yanofsky)

This is a follow up to D5804 and a partial backport of Core PR15288

Test Plan:

cmake .. -DENABLE_WERROR=ON -DCMAKE_BUILD_TYPE=Debug -DBUILD_BITCOIN_WALLET=OFF
ninja check check-functional
cmake .. -DENABLE_WERROR=ON -DCMAKE_BUILD_TYPE=Debug
ninja check check-functional

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Subscribers: deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D5816