support tensor parallel #2670

Job	Run time
build-and-test-cpp-aarch64 (openblas)	4m 3s
check-python-style	10s
build-and-test-cpp-x86_64 (ubuntu-20.04, mkl)	5m 43s
build-and-push-docker-images	28m 5s
build-and-test-cpp-x86_64 (ubuntu-20.04, dnnl)	4m 58s
build-and-test-cpp-x86_64 (macos-11, mkl)	9m 39s
build-python-wheels (ubuntu-20.04, auto64)	32m 38s
build-and-test-cpp-x86_64 (macos-11, dnnl)	10m 18s
build-python-wheels (macos-11, auto64)	37m 51s
build-python-wheels (windows-2019, auto64)	46m 5s
build-python-wheels (ubuntu-20.04, aarch64)	1h 16m 10s
build-python-wheels (macos-11, arm64)	13m 36s
build-and-deploy-docs	46s
test-python-wheels (ubuntu-20.04)	9m 22s
test-python-wheels (macos-11)	5m 22s
test-python-wheels (windows-2019)	5m 4s
publish-python-wheels-on-pypi	0s
	4h 49m 50s

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