QA: feature_filelock, interface_bitcoin_cli: Use PACKAGE_NAME in messages rather than hardcoding Bitcoin Core (Luke Dashjr)
https://github.com/bitcoin/bitcoin/pull/15896/commits/fcc443b6367b44d5fdc04db36ec4a286d5b59162
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Backport of Core [[https://github.com/bitcoin/bitcoin/pull/15896 | PR15896]]