Support Gemma model #2658

Job	Run time
build-and-test-cpp-x86_64 (ubuntu-20.04, mkl)	5m 45s
build-and-push-docker-images	3m 9s
build-and-test-cpp-x86_64 (ubuntu-20.04, dnnl)	5m 2s
build-python-wheels (ubuntu-20.04, auto64)	26m 54s
build-and-test-cpp-x86_64 (macos-11, mkl)	10m 21s
build-and-test-cpp-aarch64 (openblas)	4m 33s
build-python-wheels (macos-11, auto64)	45m 17s
check-python-style	10s
build-python-wheels (windows-2019, auto64)	41m 46s
build-and-test-cpp-x86_64 (macos-11, dnnl)	11m 39s
build-python-wheels (ubuntu-20.04, aarch64)	1h 10m 38s
build-python-wheels (macos-11, arm64)	13m 5s
test-python-wheels (ubuntu-20.04)	10m 38s
build-and-deploy-docs	42s
test-python-wheels (macos-11)	3m 42s
test-python-wheels (windows-2019)	6m 18s
publish-python-wheels-on-pypi	0s
	4h 19m 39s

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