Disable provenance/SBOM attestations #325

Job	Run time
Build and test ppc64le	21m 55s
Build and test s390x	22m 55s
Build and test amd64	5m 4s
Build and test arm64	22m 38s
Create multi-platform manifests	0s
Update Dockerhub description	-1s
	1h 12m 31s

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