[wasm] Fix trap handler testing callback

Check directly whether there is runtime support for traps instead of
encoding this in the trap ID. For OOB traps we always use the actual
trap ID, so we always emitted the code that assumes runtime support,
which is not true in some cctests.

R=ahaas@chromium.org

Bug: v8:11587
Change-Id: I29df463561bcfb3452e75b209a70c4f4d9941044
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2797289Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73764}

src/compiler/backend/arm64/code-generator-arm64.cc

@@ -405,7 +405,7 @@ class WasmOutOfLineTrap : public OutOfLineCode {
 
  private:
   void GenerateCallToTrap(TrapId trap_id) {
-    if (trap_id == TrapId::kInvalid) {
+    if (!gen_->wasm_runtime_exception_support()) {
       // We cannot test calls to the runtime in cctest/test-run-wasm.
       // Therefore we emit a call to C here instead of a call to the runtime.
       __ CallCFunction(ExternalReference::wasm_call_trap_callback_for_testing(),