Make the tests use phonon activation instead of graviton

Summary: Testing against the next upgrade is testing against phonon.

Test Plan:

cmake -GNinja .. -DTEST_WITH_UPGRADE_ACTIVATED=ON
ninja
ninja check
./test/functional/test_runnner.py --with-phononactivation --extended

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D4782