Enable policy CMP0057 for cmake version >= 3.3

Depending on the arch, ldr/str can be faster than ld1/st1, especially
for loading to one lane form. For example, on Cortex A75,

1. execution latency of 'ldr q0' and 'ldr h0' are 5
2. execution latency of 'ld1 {v0.16b}' is 6
3. execution latency of 'ld1 {v0.h}[0]' is 8

On Cortex X3,
1. execution latency of 'ldr q0' and 'ldr h0' are 6
2. execution latency of 'ld1 {v0.16b}' is 6
3. execution latency of 'ld1 {v0.h}[0]' is 8

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>

* Fix tanh typo for rvv.

* Fix tanh for rvv fp16.

* pnnx convert onnx sdap

* test reduce

* fix potential fp16s bf16s conflicts on armv7 vfpv4

* but prefer fp16 on armv8.2

* pnnx convert onnx multiheadattention

* onnx reducemean reducesum

* reducemax reducemin reduceprod

* mask buggy torch

* avoid shadow output

* benchmark: Don't use std::thread when NCNN_THREADS is OFF

* Add wasi support

cmake -B build -DCMAKE_BUILD_TYPE=Release \
	--toolchain ${wasi_sdk}/share/cmake/wasi-sdk.cmake \
	-DNCNN_RUNTIME_CPU=OFF \
	-DNCNN_DISABLE_EXCEPTION=ON \
	-DNCNN_THREADS=OFF

cmake --build build

After build, you can run benchncnn on cmdline with wasmtime:
wasmtime --dir . benchncnn

* pnnx convert onnx layernorm

* fuse early

* skip layernorm affine false test for torch 2.1

* pnnx convert onnx layernorm instancenorm groupnorm

* take num_features from input shape for instancenorm module

* torch < 1.10 can not handle track_running_stats=True

* pnnx convert onnx avgpool

* fuse gather indices

* generalized conv convtranspose

* skip maxpool dilation test for torch < 1.12

* ceil mode for opset 9

* update swiftshader

* skip vs2017 swiftshader

* test mha oom

* pnnx reset onnx input shape

* eliminate noop cast

* pnnx convert onnx pad

* pnnx convert onnx linear sigmoid softmax relu

* old onnx softmax

The updated ruapu adds support for multiple architectures such as RISC-V, MIPS, and Loongson, and can detect more Arm features.

The latest version is 10b02b3755.

* skip mips loongarch riscv oom test atm

* test softmax oom

* workaround vs2019 crash