fix(libsinsp): enable metrics collector on all platforms #6297

Job	Run time
build-libs-linux-amd64-static 🎃	22m 55s
build-libs-others-amd64 😨 (windows-latest, MultiThreaded)	6m 5s
build-libs-linux-amd64 😁 (system_deps)	6m 28s
build-shared-libs-linux-amd64 🧐	4m 59s
build-shared-libs-macos-amd64 😨	2m 1s
build-libs-others-amd64 😨 (windows-latest, MultiThreadedDLL)	3m 25s
build-libs-others-amd64 😨 (macos-latest)	4m 42s
build-libs-linux-amd64 😁 (bundled_deps)	18m 47s
build-libs-linux-amd64 😁 (system_deps_minimal)	4m 46s
build-libs-linux-amd64 😁 (sanitizers)	18m 57s
build-libs-emscripten 🧐	4m 36s
run-e2e-tests-amd64 (system_deps)	9m 30s
build-libs-linux-arm64 😁 (system_deps)	6m 25s
run-e2e-tests-amd64 (bundled_deps)	20m 10s
build-libs-linux-arm64 😁 (bundled_deps)	18m 35s
test-libs-static (bundled_deps)	14m 54s
run-e2e-tests-amd64 (asan)	21m 25s
build-libs-linux-arm64 😁 (system_deps_minimal)	4m 47s
build-libs-linux-arm64 😁 (sanitizers)	16m 46s
	3h 30m 13s

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