b658d7d5c5 test: update assert_fee_amount() in test_framework/util.py (Jon Atack)
Pull request description:
Follow-up to 42e1b5d979 (#12486).
- update call to `round()` with our utility function `satoshi_round()` to avoid intermittent test failures
- rename `fee_per_kB` to `feerate_BTC_kvB` for precision
- store division result in `feerate_BTC_vB`
Possibly resolves#19418.
ACKs for top commit:
meshcollider:
utACK b658d7d5c5
Tree-SHA512: f124ded98c913f98782dc047a85a05d3fdf5f0585041fa81129be562138f6261ec1bd9ee2af89729028277e75b591b0a7ad50244016c2b2fa935c6e400523183