Added DNS state cleanup upon server reply for passthrough/Masquerade #10

Job	Run time
build_arm64_release (linux, tunnel, arm64)	29s
build_arm64_release (linux, tunnel, arm64)	30s
build_amd64_release (linux, tunnel, amd64)	1m 52s
build_amd64_release (linux, tunnel, amd64)	2m 11s
build_amd64_release (linux, router, amd64)	2m 26s
build_amd64_release (linux, router, amd64)	2m 4s
build_arm64_release (linux, router, arm64)	34s
build_arm64_release (linux, router, arm64)	29s
regression_test	39s
regression_test	2h 51m 54s
	3h 3m 8s

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