kernel/x86_64: fixed cscal and zscal

kernel/generic: Fixed cscal and zscal

LoongArch64: fixed cscal and zscal

- Calculate predicate outside the loop
- Divide matrix in blocks of 3

kernel/riscv64:fixed the performance problem in RISCV64_ZVL256 when OPENBLAS_K is small

Accumulate results in output register explicitly

- modify the macro conditions in Makefile.system
- Delete development test code

Related to issue#5279

Added shgemm_kernel_8x8 for RISCV64_ZVL128B and shgemm_kernel_16x8 fo…

Added HFLOAT16 support for RISCV64
Added shgemm_kernel_8x8 for RISCV64_ZVL128B and shgemm_kernel_16x8 for RISCV64_ZVL256B based on HFLOAT16
The instruction sets used are ZVFH and ZFH, which need to be supported by RVV1.0

Related to issue #5279
Co-authored-by Linjin Li <linjin_li@163.com>

kernel/riscv64:Optimized the implementation of axpby on TARGET=RISCV64_ZVL256B.

Fix compilation with pre-C99 compilers

Improvement of 2D thread-partitioned GEMM for M << N case

Fix building with mingw32-gcc15

Expressly provide a shared libs option in CMakelists.txt

CMAKE: Do not suffix the library with a 64 if LIBNAMESUFFIX already contains it

Fix compiler options for NeoverseN1 and CortexX2/A?10 in CMake builds

enable sbgemm to be forward to sbgemv on arm64

Fix conditional inclusion of SGEMM_KERNEL_DIRECT

kernel/riscv64:Added support for omatcopy on RISCV64_ZVL256B

kernel/riscv64:Fixed the bug of openblas_utest_ext failing in c/zgemv and some c/zgbmv tests:

Fix cgemm_ncopy_16_lasx function for lapack-test and add it C function