[wasm] Load imported functions with LoadImmutableFromObject

This is the only change in crrev.com/c/3398111 that may have impacted
performance.

Bug: chromium:1289597
Change-Id: I375535aa5c8382073565f1270dc5cc9c5598af4e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3406534Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78734}

src/compiler/wasm-compiler.cc

@@ -3068,7 +3068,7 @@ Node* WasmGraphBuilder::BuildImportCall(const wasm::FunctionSig* sig,
       func_index_intptr, gasm_->IntPtrConstant(kSystemPointerSize));
   Node* imported_targets =
       LOAD_INSTANCE_FIELD(ImportedFunctionTargets, MachineType::Pointer());
-  Node* target_node = gasm_->LoadImmutable(
+  Node* target_node = gasm_->LoadImmutableFromObject(
       MachineType::Pointer(), imported_targets, func_index_times_pointersize);
   args[0] = target_node;