Accept left offsets in the rotary embeddings layer #2325

Job	Run time
build-and-push-docker-images	43m 21s
build-python-wheels (ubuntu-20.04, auto64)	38m 5s
build-python-wheels (macos-11, auto64)	42m 54s
build-python-wheels (windows-2019, auto64)	55m 12s
build-python-wheels (ubuntu-20.04, aarch64)	2h 10m 55s
build-python-wheels (macos-11, arm64)	9m 52s
build-and-test-cpp-aarch64 (openblas)	11m 44s
build-and-test-cpp-x86_64 (ubuntu-20.04, mkl)	6m 59s
build-and-test-cpp-x86_64 (ubuntu-20.04, dnnl)	6m 15s
build-and-test-cpp-x86_64 (macos-11, mkl)	9m 31s
build-and-test-cpp-x86_64 (macos-11, dnnl)	9m 32s
check-python-style	12s
build-and-deploy-docs	49s
test-python-wheels (ubuntu-20.04)	13m 37s
test-python-wheels (macos-11)	12m 3s
test-python-wheels (windows-2019)	3m 28s
publish-python-wheels-on-pypi	0s
	6h 34m 29s

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