refactor(userspace/libsinsp)!: deprecate gen_event class family #4937

Job	Run time
build-libs-linux-amd64 😁 (system_deps)	5m 12s
build-libs-linux-amd64 😁 (bundled_deps)	14m 6s
build-libs-linux-amd64-asan 🧐	8m 29s
build-libs-linux-amd64 😁 (system_deps_w_chisels)	5m 29s
build-libs-linux-amd64 😁 (system_deps_minimal)	3m 45s
build-libs-linux-amd64-static 🎃	13m 59s
build-libs-others-amd64 😨 (windows-latest)	4m 51s
build-libs-linux-arm64 😁 (system_deps)	5m 21s
build-libs-others-amd64 😨 (macos-latest)	11m 2s
build-libs-linux-arm64 😁 (bundled_deps)	13m 36s
build-shared-libs-linux-amd64 🧐	3m 23s
build-libs-linux-arm64 😁 (system_deps_w_chisels)	5m 30s
build-libs-emscripten 🧐	3m 46s
build-libs-linux-arm64 😁 (system_deps_minimal)	3m 46s
build-shared-libs-macos-amd64 😨	4m 44s
run-e2e-tests-amd64 (system_deps)	8m 40s
test-libs-static (bundled_deps)	14m 9s
run-e2e-tests-amd64 (bundled_deps)	14m 8s
run-e2e-tests-amd64 (system_deps_w_chisels)	9m 2s
run-e2e-tests-amd64 (asan)	14m 7s
	2h 47m 5s

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