test: Parallelize package tests in high-cost packages. #11107

Job	Run time
YAML Lint	18s
Generate Code	1m 17s
Go Lint	1m 42s
Rego PR checks	1m 29s
WASM	10s
Check Generated	31s
Go Test (linux)	4m 9s
Go Build (linux amd64)	2m 27s
Go compat build/test (ubuntu-22.04, 1.21)	1m 50s
Go Test (darwin)	4m 3s
Go Build (linux arm64)	2m 7s
Go compat build/test (macos-14, 1.21)	2m 1s
Go Race Detector	6m 11s
Go Build (linux arm64GO_TAGS="-tags=opa_no_oci")	2m 8s
Go Build (windows amd64)	2m 33s
Go Build (darwin amd64)	1m 22s
Go Build (darwin arm64)	52s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64, amd64)	11s
docker image smoke test	29s
smoke-test-binaries (linux, ubuntu-22.04, opa_linux_amd64_static, amd64, disabled)	9s
smoke-test-binaries (darwin, macos-13, opa_darwin_amd64, amd64)	20s
smoke-test-binaries (darwin, macos-14, opa_darwin_arm64_static, arm64, disabled)	19s
smoke-test-binaries (windows, windows-latest, opa_windows_amd64.exe, amd64)	33s
	37m 11s

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