[CMAKE] Add the test suite to the log name

Summary:
This prevents naming collision to occur, e.g. when running with and
without upgrade activated.

Test Plan:

ninja check-bitcoin check-bitcoin-upgrade-activated

Check the logs are now available for each test suite variant.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D7024