[wasm-simd] Fix MulAddOptimizationTest on BE

globals are no longer LE enforced after https://crrev.com/c/2944437.
LANE is used instead to pick the correct lane on BE machines.

Change-Id: I106bebda2633a4673ad4b5165c0440cc445d9475
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3148036Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Cr-Commit-Position: refs/heads/main@{#76730}

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

@@ -1715,7 +1715,7 @@ void RunExtMulAddOptimizationTest(TestExecutionTier execution_tier,
 
       T expected = addop(MultiplyLong<T, S>(x, x), y);
       for (int i = 0; i < lanes; i++) {
-        CHECK_EQ(expected, ReadLittleEndianValue<T>(&g[i]));
+        CHECK_EQ(expected, LANE(g, i));
       }
     }
   }