Relax `protobuf<5.0.0` restriction #11611

Job	Run time
lint-misc	12s
lint-frontend	1m 34s
lint-python-flake8 (3.9)	11s
build-data-server-pip (native, ubuntu-20.04, 1.65.0)	1m 14s
lint-python-flake8 (3.10)	16s
lint-python-yaml-docs	25s
build-data-server-pip (native, macos-12, 1.65.0)	2m 2s
lint-python-flake8 (3.11)	13s
lint-rust (1.65.0, 0.16.1)	36s
build-data-server-pip (universal, ubuntu-20.04, 1.65.0)	10s
build (tf, 3.9)	9m 45s
build (notf, 3.9)	5m 24s
	22m 2s

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