[CMAKE] Run wallet tests as part of the check-bitcoin target
The wallet tests were build with the test_bitcoin executable but have
been forgotten as part of the check-bitcoin target.
Ensure the wallet tests are run.
cmake -GNinja .. -DBUILD_BITCOIN_WALLET=OFF ninja check-bitcoin
Ensure the tests are run, but no wallet test.
Reviewers: #bitcoin_abc, deadalnix, jasonbcox
Reviewed By: #bitcoin_abc, jasonbcox
Differential Revision: https://reviews.bitcoinabc.org/D5008