Add preliminary cpu autodetection for Zen5/5c #5031

Job	Run time
build (ubuntu-latest, gfortran, cmake)	42m 34s
build (ubuntu-latest, gfortran, make)	16m 30s
build (ubuntu-latest, flang, cmake)	12m 27s
build (ubuntu-latest, flang, make)	7m 21s
cross_build (mips64el, mips64el-linux-gnuabi64, DYNAMIC_ARCH=1 TARGET=GENERIC)	5m 47s
build (macos-latest, gfortran, cmake)	32m 8s
cross_build (riscv64, riscv64-linux-gnu, TARGET=RISCV64_GENERIC)	9m 35s
build (macos-latest, gfortran, make)	6m 23s
cross_build (mipsel, mipsel-linux-gnu, TARGET=MIPS1004K)	6m 0s
cross_build (alpha, alpha-linux-gnu, TARGET=EV4)	6m 2s
msys2 (UCRT64, int32, Release)	18m 59s
msys2 (UCRT64, int64, Release)	14m 56s
msys2 (MINGW32, int32, Release)	20m 54s
msys2 (CLANG64, int32, Release)	20m 29s
msys2 (CLANG64, int64, Release)	18m 39s
msys2 (CLANG32, int32, Release)	11m 10s
msys2 (UCRT64, int32, None, mingw-w64-ucrt-x86_64, fc)	16m 46s
	4h 26m 40s

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