feat(cmd): Adding fail-non-empty flag6132 #8795

Job	Run time
Rego PR checks	15s
Generate Code	1m 46s
Go Lint	2m 10s
Check Generated	37s
Go Build (linux amd64)	4m 28s
Go Build (linux arm64)	2m 42s
Go Build (windows)	3m 50s
Go Build (darwin)	1m 55s
Go Race Detector	7m 38s
Go compat build/test (ubuntu-22.04, 1.19)	5m 5s
Go compat build/test (macos-latest, 1.19)	5m 40s
Go Test (linux)	6m 43s
Go Test (darwin)	5m 45s
WASM	12s
docker image smoke test	39s
smoke-test-binaries (ubuntu-22.04, opa_linux_amd64)	17s
smoke-test-binaries (ubuntu-22.04, opa_linux_amd64_static, disabled)	14s
smoke-test-binaries (macos-latest, opa_darwin_amd64)	31s
smoke-test-binaries (windows-latest, opa_windows_amd64.exe)	41s
	51m 8s

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