proto: Use match for grease with reserved version #5324

Job	Run time
test on freebsd	4m 11s
test (ubuntu-latest, stable)	1m 25s
test (ubuntu-latest, beta)	1m 32s
test (macos-latest, stable)	1m 11s
test on illumos	6m 33s
test on netbsd	5m 22s
test (windows-latest, stable)	3m 55s
test on solaris	8m 26s
audit	22s
features (ubuntu-latest)	1h 21m 11s
features (macos-latest)	27m 8s
lint	1m 6s
features (windows-latest)	47m 41s
msrv	1m 15s
test-android (x86_64-linux-android, x86_64, 26)	3m 0s
test-android (x86_64-linux-android, x86_64, 25)	2m 45s
test-aws-lc-rs	1m 54s
test-android (i686-linux-android, x86, 26)	2m 46s
test-android (i686-linux-android, x86, 25)	3m 33s
test wasm32-unknown-unknown	1m 11s
	3h 26m 27s

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