use parametrized values in constraint templates

[sozercan]

artifact-attestations-opa-provider/validation/from-org-with-signer-constraint-template.yaml

Line 36 in 67d793c

not fromOrgWithSigner(response, ["your-org-1", "your-org-2"], ["your-org-1/your-repo"])

uses hardcoded data instead of parameterized constraint values. can we move these into easy to customize constraint parameters?