new(libsinsp): inspector thread pool #6298

Job	Run time
build-libs-linux-amd64 😁 (system_deps)	6m 41s
build-libs-linux-amd64-static 🎃	22m 31s
build-libs-others-amd64 😨 (windows-latest, MultiThreaded)	6m 21s
build-libs-linux-amd64 😁 (bundled_deps)	17m 35s
build-libs-linux-amd64 😁 (system_deps_minimal)	4m 51s
build-libs-others-amd64 😨 (windows-latest, MultiThreadedDLL)	5m 59s
build-shared-libs-linux-amd64 🧐	4m 50s
build-libs-linux-amd64 😁 (sanitizers)	14m 13s
build-shared-libs-macos-amd64 😨	1m 50s
build-libs-others-amd64 😨 (macos-latest)	3m 54s
build-libs-linux-arm64 😁 (system_deps)	6m 18s
build-libs-linux-arm64 😁 (bundled_deps)	19m 17s
run-e2e-tests-amd64 (system_deps)	8m 56s
test-libs-static (bundled_deps)	15m 2s
build-libs-linux-arm64 😁 (system_deps_minimal)	4m 49s
run-e2e-tests-amd64 (bundled_deps)	20m 30s
build-libs-linux-arm64 😁 (sanitizers)	17m 51s
run-e2e-tests-amd64 (asan)	21m 51s
build-libs-emscripten 🧐	4m 35s
	3h 27m 54s

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