Refactor OPA helm tests

Package Merge Request

Package Changes

check constraints for deny then test for violations

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/merge_requests/121

For Issue

Closes https://repo1.dso.mil/platform-one/big-bang/apps/core/policy/-/issues/133

BB Processes

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