feat(libsinsp_e2e): add unix_udp_client_server_read test #2177

Job	Run time
build-test-e2e-amd64 😇 (bundled_deps)	13m 42s
build-test-e2e-arm64 😇 (bundled_deps)	25m 20s
test-e2e-amd64-kmod 😇 (bundled_deps)	9m 10s
test-e2e-amd64-bpf 😇 (bundled_deps)	11m 57s
test-e2e-amd64-modern-bpf 😇 (bundled_deps)	12m 49s
test-e2e-arm64-kmod 😇 (bundled_deps)	14m 46s
test-e2e-arm64-bpf 😇 (bundled_deps)	17m 40s
test-e2e-arm64-modern-bpf 😇 (bundled_deps)	50m 58s
	2h 36m 22s

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