[WIP] Add BLAS interface to ?GEMM_BATCH to complement the CBLAS one #6088

Job	Run time
cross_build (mipsel, mipsel-linux-gnu, TARGET=MIPS1004K)	3m 39s
build (ubuntu-latest, flang, cmake)	45m 50s
build (ubuntu-latest, gfortran, cmake)	45m 44s
cross_build (riscv64, riscv64-linux-gnu, TARGET=RISCV64_GENERIC)	2m 41s
cross_build (mips64el, mips64el-linux-gnuabi64, DYNAMIC_ARCH=1 TARGET=GENERIC)	3m 47s
build (macos-latest, gfortran, cmake)	42m 18s
msys2 (MINGW32, int32, Release)	21m 47s
msys2 (UCRT64, int32, Release)	15m 21s
msys2 (UCRT64, int64, Release)	15m 43s
msys2 (CLANG64, int32, Release)	17m 51s
build (ubuntu-latest, flang, make)	17m 58s
build (ubuntu-latest, gfortran, make)	21m 51s
msys2 (CLANG64, int64, Release)	19m 8s
build (macos-latest, gfortran, make)	14m 34s
msys2 (UCRT64, int32, None, mingw-w64-ucrt-x86_64, fc)	13m 34s
neoverse_build	7m 50s
cross_build (alpha, alpha-linux-gnu, TARGET=EV4)	2m 59s
	5h 12m 35s

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