Use a macro to factorize declaration of some float specializations (#… #2437

Job	Run time
build-and-push-docker-images	47m 13s
build-python-wheels (ubuntu-20.04, auto64)	38m 13s
build-python-wheels (macos-11, auto64)	42m 57s
build-python-wheels (windows-2019, auto64)	1h 0m 56s
build-python-wheels (ubuntu-20.04, aarch64)	1h 26m 37s
build-python-wheels (macos-11, arm64)	15m 34s
build-and-test-cpp-aarch64 (openblas)	5m 45s
build-and-test-cpp-x86_64 (ubuntu-20.04, mkl)	8m 32s
build-and-test-cpp-x86_64 (ubuntu-20.04, dnnl)	6m 8s
build-and-test-cpp-x86_64 (macos-11, mkl)	14m 58s
build-and-test-cpp-x86_64 (macos-11, dnnl)	9m 59s
check-python-style	15s
build-and-deploy-docs	56s
test-python-wheels (ubuntu-20.04)	13m 58s
test-python-wheels (macos-11)	7m 22s
test-python-wheels (windows-2019)	4m 20s
publish-python-wheels-on-pypi	0s
	6h 3m 43s

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