Support Gemma model #2660

Job	Run time
build-and-test-cpp-aarch64 (openblas)	4m 27s
build-and-push-docker-images	22m 38s
build-and-test-cpp-x86_64 (ubuntu-20.04, mkl)	5m 58s
build-and-test-cpp-x86_64 (ubuntu-20.04, dnnl)	5m 53s
build-python-wheels (ubuntu-20.04, auto64)	26m 55s
check-python-style	14s
build-and-test-cpp-x86_64 (macos-11, mkl)	11m 10s
build-python-wheels (macos-11, auto64)	38m 59s
build-and-test-cpp-x86_64 (macos-11, dnnl)	12m 8s
build-python-wheels (windows-2019, auto64)	45m 42s
build-python-wheels (ubuntu-20.04, aarch64)	1h 10m 57s
build-python-wheels (macos-11, arm64)	17m 59s
build-and-deploy-docs	29s
test-python-wheels (ubuntu-20.04)	8m 15s
test-python-wheels (macos-11)	5m 2s
test-python-wheels (windows-2019)	3m 58s
publish-python-wheels-on-pypi	0s
	4h 40m 44s

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