@actions/attest buildSLSAProvenancePredicate should add inputs into externalParameters #2331
Description
Describe the enhancement
The build result depends on the workflow inputs and these would need to be attested as well.
It would also be useful to be able to add any other external values that contribute into the artifact being attested.
This comes from actions/attest-build-provenance#55. As the actions/attest-build-provenance/predicate action has been discontinued, it has become more difficult to patch this information into the predicate.