chore(libsinsp/test): remove some more relative includes leftovers #4918

Job	Run time
build-libs-linux-amd64-asan 🧐	8m 37s
build-libs-emscripten 🧐	3m 52s
build-libs-linux-amd64-static 🎃	22m 5s
build-libs-linux-amd64 😁 (system_deps)	5m 33s
build-libs-others-amd64 😨 (windows-latest)	8m 44s
build-shared-libs-linux-amd64 🧐	3m 38s
build-libs-linux-amd64 😁 (bundled_deps)	17m 33s
build-libs-others-amd64 😨 (macos-latest)	7m 45s
build-shared-libs-macos-amd64 😨	3m 50s
build-libs-linux-amd64 😁 (system_deps_w_chisels)	5m 26s
build-libs-linux-amd64 😁 (system_deps_minimal)	3m 50s
run-e2e-tests-amd64 (system_deps)	8m 22s
build-libs-linux-arm64 😁 (system_deps)	5m 27s
run-e2e-tests-amd64 (bundled_deps)	20m 11s
test-libs-static (bundled_deps)	15m 12s
build-libs-linux-arm64 😁 (bundled_deps)	16m 35s
run-e2e-tests-amd64 (system_deps_w_chisels)	8m 35s
build-libs-linux-arm64 😁 (system_deps_w_chisels)	5m 40s
run-e2e-tests-amd64 (asan)	22m 6s
build-libs-linux-arm64 😁 (system_deps_minimal)	3m 51s
	3h 16m 52s

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