* run logtrace in finalization CI
* use specified DATA_DIR rather than assuming default
* convert rest of hardcoded local_testnet_data references
* logtrace asr needs DEBUG-level logs
* clean up some shell (not) quoting issues
- use a Debian Bullseye image
- use the distro's packages whenever possible
- cache as much as possible of the Git repos and tool binaries locally
- restrict Docker image pushing to specific branches; no build
restrictions, to allow for easy development