Increase L2 defaults for RISCV X280 / ZVL256B and ARM SVE targets in CMake cross-compilation #6010

Job	Run time
cross_build (mips64el, mips64el-linux-gnuabi64, DYNAMIC_ARCH=1 TARGET=GENERIC)	10m 1s
cross_build (riscv64, riscv64-linux-gnu, TARGET=RISCV64_GENERIC)	8m 6s
neoverse_build	7m 48s
cross_build (mipsel, mipsel-linux-gnu, TARGET=MIPS1004K)	8m 57s
build (ubuntu-latest, flang, make)	18m 22s
cross_build (alpha, alpha-linux-gnu, TARGET=EV4)	7m 49s
build (ubuntu-latest, gfortran, make)	21m 16s
msys2 (UCRT64, int32, Release)	1h 39m 24s
build (macos-latest, gfortran, make)	10m 9s
build (ubuntu-latest, flang, cmake)	45m 6s
msys2 (UCRT64, int64, Release)	1h 41m 2s
msys2 (MINGW32, int32, Release)	1h 7m 14s
msys2 (CLANG64, int32, Release)	1h 10m 38s
msys2 (CLANG64, int64, Release)	1h 9m 37s
msys2 (UCRT64, int32, None, mingw-w64-ucrt-x86_64, fc)	1h 28m 13s
build (ubuntu-latest, gfortran, cmake)	44m 59s
build (macos-latest, gfortran, cmake)	33m 10s
	11h 51m 51s

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