refactor(libsinsp): safer (integer) parameter extraction from events #4253

Job	Run time
build-libs-linux-amd64-static 🎃	35m 59s
build-libs-linux-amd64-asan 🧐	14m 7s
paths-filter	6s
build-libs-linux-amd64 😁 (system_deps)	9m 57s
build-libs-linux-amd64 😁 (bundled_deps)	33m 51s
build-libs-emscripten 🧐	8m 45s
build-libs-others-amd64 😨 (windows-latest)	9m 15s
build-libs-linux-amd64 😁 (system_deps_w_chisels)	11m 45s
build-libs-others-amd64 😨 (macos-latest)	7m 3s
build-libs-linux-amd64 😁 (system_deps_minimal)	3m 32s
build-shared-libs-linux-amd64 🧐	4m 43s
build-shared-libs-macos-amd64 😨	3m 52s
run-e2e-tests-amd64 (system_deps)	11m 45s
run-e2e-tests-amd64 (bundled_deps)	29m 57s
run-e2e-tests-amd64 (system_deps_w_chisels)	15m 31s
test-libs-static (bundled_deps)	25m 43s
run-e2e-tests-amd64 (asan)	35m 43s
build-libs-s390x 😁 (system_deps)	1h 53m 31s
test-scap-x86 😆 (bundled_deps)	0s
test-drivers-x86 😇 (bundled_deps)	0s
	6h 15m 5s

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