Use WASM f32x4 relaxed min/max for relaxed simd build (microsoft#24324)

### Description
Use wasm_f32x4_relaxed_max and wasm_f32x4_relaxed_min in WASM relaxed
SIMD build.


### Motivation and Context
This PR replaces wasm_f32x4_min/max with the relaxed SIMD counterparts
wasm_f32x4_relaxed_min/max in WASM relaxed SIMD build.

According to [relaxed SIMD
proposal](https://github.com/WebAssembly/relaxed-simd/blob/main/proposals/relaxed-simd/Overview.md#relaxed-min-and-max),
the wasm_f32x4_relaxed_min/max allow implementation-defined behavior on
NaN propagation and -0.0 vs +0.0. This enables WASM runtimes to use
minps/maxps on x64 platforms and improves the performance.

e.g. for wasm_f32x4_max -> wasm_f32x4_relaxed_max
wasm_f32x4_max: [implementation in
V8](https://source.chromium.org/chromium/chromium/src/+/main:v8/src/codegen/shared-ia32-x64/macro-assembler-shared-ia32-x64.cc;l=231)
wasm_f32x4_relaxed_max: maxps

This change would affect kernel functions rely on MlasMaximumFloat32x4
and MlasMinimumFloat32x4, including various activations and reduced
min/max kernels. In mlas micro bench "COMPUTESOFTMAXINPLACE...", this
change provides a performance improvement of up to 60% on x64 devices.

Author: fanchenkong1

onnxruntime/core/mlas/lib/mlasi.h

@@ -1455,6 +1455,9 @@ MlasConvDepthwiseFloat_CHW(
 #endif
 #elif defined(MLAS_TARGET_WASM_SIMD)
 #define MLAS_WASM_SIMD_INTRINSICS
+#if defined(MLAS_TARGET_WASM_RELAXED_SIMD)
+#define MLAS_WASM_RELAXED_SIMD_INTRINSICS
+#endif
 #elif defined(MLAS_TARGET_LARCH64)
 #define MLAS_LSX_INTRINSICS
 #endif
@@ -2265,6 +2268,8 @@ MlasMaximumFloat32x4(MLAS_FLOAT32X4 Vector1, MLAS_FLOAT32X4 Vector2)
 #elif defined(MLAS_VSX_INTRINSICS)
     // Don't use vec_max to avoid undefined behavior if NAN
     return vec_sel(Vector2, Vector1, vec_cmpgt(Vector1, Vector2));
+#elif defined(MLAS_WASM_RELAXED_SIMD_INTRINSICS)
+    return wasm_f32x4_relaxed_max(Vector1, Vector2);
 #elif defined(MLAS_WASM_SIMD_INTRINSICS)
     return wasm_f32x4_max(Vector1, Vector2);
 #elif defined(MLAS_LSX_INTRINSICS)
@@ -2285,6 +2290,8 @@ MlasMinimumFloat32x4(MLAS_FLOAT32X4 Vector1, MLAS_FLOAT32X4 Vector2)
 #elif defined(MLAS_VSX_INTRINSICS)
     // Don't use vec_min to avoid undefined behavior if NAN
     return vec_sel(Vector2, Vector1, vec_cmpgt(Vector2, Vector1));
+#elif defined(MLAS_WASM_RELAXED_SIMD_INTRINSICS)
+    return wasm_f32x4_relaxed_min(Vector1, Vector2);
 #elif defined(MLAS_WASM_SIMD_INTRINSICS)
     return wasm_f32x4_min(Vector1, Vector2);
 #elif defined(MLAS_LSX_INTRINSICS)