[wasm-simd] Move sat round q15 mul high to MVP

This instruction has been merged into the proposal:
https://github.com/WebAssembly/simd/pull/365

Bug: v8:10971
Change-Id: I4dcad343a99271e1af4a48497e9f4ecc20785dcf
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2632011Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72177}

src/wasm/wasm-opcodes.h

@@ -406,6 +406,7 @@ bool V8_EXPORT_PRIVATE IsJSCompatibleSignature(const FunctionSig* sig,
   V(I16x8ExtMulHighI8x16S, 0xfd9d, s_ss)     \
   V(I16x8ExtMulLowI8x16U, 0xfd9e, s_ss)      \
   V(I16x8ExtMulHighI8x16U, 0xfd9f, s_ss)     \
+  V(I16x8Q15MulRSatS, 0xfd9c, s_ss)          \
   V(I32x4Abs, 0xfda0, s_s)                   \
   V(I32x4Neg, 0xfda1, s_s)                   \
   V(V32x4AnyTrue, 0xfda2, i_s)               \
@@ -496,7 +497,6 @@ bool V8_EXPORT_PRIVATE IsJSCompatibleSignature(const FunctionSig* sig,
   V(I16x8SignSelect, 0xfd7e, s_sss)         \
   V(I32x4SignSelect, 0xfd7f, s_sss)         \
   V(I64x2SignSelect, 0xfd94, s_sss)         \
-  V(I16x8Q15MulRSatS, 0xfd9c, s_ss)         \
   V(I32x4ExtAddPairwiseI16x8S, 0xfda5, s_s) \
   V(I32x4ExtAddPairwiseI16x8U, 0xfda6, s_s) \
   V(I16x8ExtAddPairwiseI8x16S, 0xfdc2, s_s) \

test/cctest/wasm/test-run-wasm-simd.cc

@@ -2406,7 +2406,6 @@ WASM_SIMD_TEST(I16x8RoundingAverageU) {
 }
 
 WASM_SIMD_TEST_NO_LOWERING(I16x8Q15MulRSatS) {
-  FLAG_SCOPE(wasm_simd_post_mvp);
   RunI16x8BinOpTest<int16_t>(execution_tier, lower_simd, kExprI16x8Q15MulRSatS,
                              SaturateRoundingQMul<int16_t>);
 }