proto: Replace calls to Duration::new #5341

Job	Run time
test on netbsd	5m 13s
test on freebsd	4m 13s
test on solaris	6m 17s
audit	22s
features (ubuntu-latest)	1h 23m 8s
features (macos-latest)	24m 2s
msrv	1m 10s
features (windows-latest)	52m 14s
lint	1m 4s
test (ubuntu-latest, stable)	1m 32s
test-android (x86_64-linux-android, x86_64, 26)	3m 0s
test-aws-lc-rs	1m 51s
test-android (x86_64-linux-android, x86_64, 25)	2m 45s
test on illumos	6m 53s
test-android (i686-linux-android, x86, 26)	2m 51s
test (ubuntu-latest, beta)	1m 37s
test wasm32-unknown-unknown	47s
test-android (i686-linux-android, x86, 25)	2m 38s
test (macos-latest, stable)	1m 7s
test (windows-latest, stable)	4m 26s
	3h 27m 10s

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