Arbitrary vars in rule refs #8761

Job	Run time
Go Lint	2m 59s
Generate Code	1m 49s
Rego PR checks	17s
Check Generated	57s
Go Test (linux)	6m 8s
Go Test (darwin)	6m 34s
Go Build (linux amd64)	4m 9s
Go Build (linux arm64)	3m 50s
Go Build (windows)	4m 4s
Go Build (darwin)	2m 9s
Go compat build/test (ubuntu-22.04, 1.19)	4m 50s
Go compat build/test (macos-latest, 1.19)	5m 42s
Go Race Detector	8m 53s
WASM	9m 38s
docker image smoke test	41s
smoke-test-binaries (ubuntu-22.04, opa_linux_amd64)	21s
smoke-test-binaries (ubuntu-22.04, opa_linux_amd64_static, disabled)	18s
smoke-test-binaries (macos-latest, opa_darwin_amd64)	37s
smoke-test-binaries (windows-latest, opa_windows_amd64.exe)	43s
	1h 4m 39s

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