cleanup(userspace/libsinsp): remove and rearrange legacy definitions #4866

Job	Run time
build-libs-linux-amd64-static 🎃	22m 35s
build-libs-linux-amd64-asan 🧐	8m 26s
build-libs-linux-amd64 😁 (system_deps)	5m 42s
build-libs-emscripten 🧐	4m 58s
build-libs-others-amd64 😨 (windows-latest)	8m 50s
build-libs-linux-amd64 😁 (bundled_deps)	16m 49s
build-shared-libs-linux-amd64 🧐	3m 37s
build-libs-others-amd64 😨 (macos-latest)	7m 16s
build-libs-linux-amd64 😁 (system_deps_w_chisels)	5m 23s
build-shared-libs-macos-amd64 😨	6m 15s
build-libs-linux-amd64 😁 (system_deps_minimal)	3m 44s
run-e2e-tests-amd64 (system_deps)	8m 24s
build-libs-linux-arm64 😁 (system_deps)	5m 26s
test-libs-static (bundled_deps)	14m 41s
run-e2e-tests-amd64 (bundled_deps)	20m 15s
build-libs-linux-arm64 😁 (bundled_deps)	17m 4s
run-e2e-tests-amd64 (system_deps_w_chisels)	8m 31s
build-libs-linux-arm64 😁 (system_deps_w_chisels)	5m 33s
run-e2e-tests-amd64 (asan)	21m 22s
build-libs-linux-arm64 😁 (system_deps_minimal)	3m 44s
	3h 18m 35s

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