Add unit test for NSS users/groups #6067

Job	Run time
build-libs-emscripten 🧐	4m 16s
build-libs-linux-amd64-static 🎃	22m 22s
build-libs-linux-amd64 😁 (system_deps)	6m 4s
build-libs-linux-amd64 😁 (bundled_deps)	17m 26s
build-libs-others-amd64 😨 (windows-latest, MultiThreaded)	6m 0s
build-libs-linux-amd64 😁 (system_deps_minimal)	4m 32s
build-shared-libs-linux-amd64 🧐	4m 30s
build-libs-others-amd64 😨 (windows-latest, MultiThreadedDLL)	6m 5s
build-libs-linux-amd64 😁 (sanitizers)	14m 7s
build-libs-others-amd64 😨 (macos-latest)	3m 34s
build-libs-linux-arm64 😁 (system_deps)	6m 24s
build-shared-libs-macos-amd64 😨	1m 44s
build-libs-linux-arm64 😁 (bundled_deps)	18m 34s
run-e2e-tests-amd64 (system_deps)	8m 52s
build-libs-linux-arm64 😁 (system_deps_minimal)	4m 44s
test-libs-static (bundled_deps)	14m 41s
run-e2e-tests-amd64 (bundled_deps)	20m 24s
build-libs-linux-arm64 😁 (sanitizers)	17m 55s
run-e2e-tests-amd64 (asan)	21m 38s
	3h 23m 52s

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