loongarch: Optimizing the performance of the GEMM on servers

AIX uses KERNEL.POWER8 optimization on POWER9 and changing
the default GEMM parameters in param.h to use POWER8 values
on POWER9.

MIPS: Enable MSA

Fix BLAS and LAPACK tests for RVV 1.0 target, update to 0.12.0 intrincics

* Update intrincics API to 0.12.0 version (Stride Segment Loads/Stores)
* Fixed nrm2, axpby, ncopy, zgemv and scal kernels
* Added zero size checks

Add Optimizations for LoongArch.

Current RVV x280 target depends on vlen=512-bits for Level 3 operations.
Commit adds generic target that supports vlen=128-bits.
New target uses the same scalable kernels as x280 for Level 1&2 operations, and autogenerated kernels for Level 3 operations.
Functional correctness of Level 3 operations tested on vlen=128-bits using QEMU v8.1.1 for ctests and BLAS-Tester.

POWER10 optimizations are disabled when using default AIX assembler.
As we have fixed many issues recently, enabling optimization path
for default assembler.

This patch removes the prefetches from cgemm/zgemm which improves the performance similar to sgemm/dgemm did in #3868, this means I'm happy to enable this on any applicable cores.

I also replicated the unrolling the copies from sgemm and dgemm.

In order to enable support for future cores which have similar tunings
(in this case I'm doing this for the Arm(R) Neoverse(TM) V2 core), this generically detects SVE support and enables it. This should better manage the size and complexity of dynamic dispatch rather than just copy pasting the same parameters.

To make `ARMV8SVE` more representive of the common 128-bit SVE case,
I've split it and similar parameters from A64FX which has the wider
512-bit SVE.

Use SVE kernel for SGEMM/DGEMM on Arm(R) Neoverse(TM) V1

Propagate SWITCH_RATIO to DYNAMIC_ARCH builds

This re-spins #3869 with some additional copy unrolling which helps maintain SYRK performance.

After #3868, the SVE kernels represent a pretty good boost.

This re-uses ARMV8SVE as a base and I'm going to incrementally move everything to use ARMV8SVE in additional patches (as well as fix up anything that's not already in ARMV8SVE).

This seems like a good balance of values for reasonably sized matrices. With `SWITCH_RATIO=16` the DGEMM scales better to bigger sizes but the better solution would be some kind of
thread throttling so I've gone with `SWITCH_RATIO=8`.

Previously dynamic builds were either using the default SWITCH_RATIO
or one from the higher level architecture; this patch ensures the
dynamic builds can use this parameter as well.

add riscv level3 C,Z kernel functions.

* fix multiple numerical stability and corner case issues
* add a script to generate arbitrary gemm kernel shapes
* add a generic zvl256b target to demonstrate large gemm kernel unrolls

From testing this yields better results than the default of `2`.

It is really dangerous to fallback to Loongson core on other
MIPS64 processors.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>

1. Modify the algorithm to resolve multithreading failures
    2. No memory allocation in sbgemm kernel
    3. Optimize when alpha == 1.0f

implement ncopy tcopy kernel_8x4