Bump OPA version from v0.64.1 to v0.65.0 and v0.66.0

[github-actions[bot]]

🗣 Description

• This pull request was created by a GitHub Action to bump ScubaGear's Open Policy Agent (OPA) executable version dependency.

• Please fill out the rest of the template that the Action did not cover.

• Also, added support for both 0.65.0. Both version 0.65.0 and 0.66.0 of OPA need to be tested for compatibility with ScubaGear.

  💭 Motivation and context

• Bump to the latest OPA version v0.66.0

  🧪 Testing

• Currently a human should still check if bumping the OPA version affects ScubaGear.

  ✅ Pre-approval checklist

• [x] This PR has an informative and human-readable title.

• [x] PR targets the correct parent branch (e.g., main or release-name) for merge.

• [x] Changes are limited to a single goal - eschew scope creep!

• [x] Changes are sized such that they do not touch excessive number of files.

• [x] All future TODOs are captured in issues, which are referenced in code comments.

• [x] These code changes follow the ScubaGear content style guide.

• [x] Related issues these changes resolve are linked preferably via closing keywords.

• [x] All relevant type-of-change labels added.

• [x] All relevant project fields are set.

• [x] All relevant functional tests passed.

• [x] All automated checks (e.g., linting, static analysis, unit/smoke tests) passed.

  ✅ Pre-merge checklist

• [ ] PR passed smoke test check.

• [ ] Feature branch has been rebased against changes from parent branch, as needed

  Use Rebase branch button below or use this reference to rebase from the command line.

• [ ] Resolved all merge conflicts on branch

• [ ] Notified merge coordinator that PR is ready for merge via comment mention

  ✅ Post-merge checklist

• [ ] Feature branch deleted after merge to clean up repository.

• [ ] Verified that all checks pass on parent branch (e.g., main or release-name) after merge.

[buidav]

Looks like OPA versioning isn't the cause for #1161. Back to investigating.

@nanda-katikaneni this is ready to merge