proto: Pass SocketAddr by value #5287

Job	Run time
test on freebsd	4m 29s
test on illumos	6m 36s
test on netbsd	5m 28s
test on solaris	5m 28s
audit	24s
features (ubuntu-latest)	1h 18m 27s
lint	1m 18s
features (macos-latest)	28m 17s
features (windows-latest)	49m 5s
msrv	1m 11s
test (ubuntu-latest, stable)	1m 33s
test (ubuntu-latest, beta)	1m 26s
test-android (x86_64-linux-android, x86_64, 26)	2m 49s
test (macos-latest, stable)	1m 8s
test-android (x86_64-linux-android, x86_64, 25)	2m 50s
test (windows-latest, stable)	3m 15s
test-android (i686-linux-android, x86, 26)	3m 1s
test-android (i686-linux-android, x86, 25)	2m 17s
test-aws-lc-rs	1m 55s
test wasm32-unknown-unknown	47s
	3h 21m 44s

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