kernel: Refactor 32f_x2_subtract_32f kernel #276

Job	Run time
Build on ubuntu-20.04 g++-7	1m 38s
Build on ubuntu-20.04 g++-8	1m 41s
build-macos	1m 23s
Build on ubuntu-latest g++-9	1m 43s
Build on ubuntu-latest g++-10	1m 47s
Build on ubuntu-20.04 clang-7	51s
Build static on ubuntu-latest	55s
Build on ubuntu-20.04 clang-8	52s
build-windows	2m 46s
Build on ubuntu-20.04 clang-9	1m 35s
Build on ubuntu20.04 aarch64 g++-8	11m 13s
Build on ubuntu-20.04 clang-10	1m 15s
Build on ubuntu20.04 aarch64 g++-9	10m 3s
Build on ubuntu-20.04 clang-11	58s
Build on ubuntu20.04 aarch64 g++-10	7m 5s
Build on ubuntu-latest clang-12	54s
Build on ubuntu22.04 aarch64 g++-12	10m 20s
Build on ubuntu-latest clang-13	1m 22s
Build on ubuntu20.04 aarch64 clang-9	17m 50s
Build on ubuntu-latest clang-14	56s
Build on ubuntu20.04 aarch64 clang-10	14m 49s
Build on ubuntu22.04 aarch64 clang-14	14m 10s
Build on ubuntu22.04 armv7 g++-12	6m 25s
Build on ubuntu22.04 ppc64le g++-12	7m 45s
Build on ubuntu22.04 s390x g++-12	9m 12s
Build on ubuntu22.04 riscv64 g++-12	8m 3s
	2h 17m 31s

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