417b6c1d2990ffc78c029442e027797d724a101f bitcoinconsensus: invalid flags should be set to bitcoinconsensus_error type, add test cases covering bitcoinconsensus error codes (Thomas Kerin)
Pull request description:
A check was added to the bitcoinconsensus verify_script codepath to ensure that callers only used _exposed_ interpreter flags. I think this error should be written to `bitcoinconsensus_err* err` and not returned by verify_script?
~~I modified the check so it indicates the error using *err like the others, and added tests covering the error codes.~~
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Backport of Core PR13655