[gcmole] Disable gcmole for Isolate::UnwindAndFindHandler

Temporary fix to allow running gcmole on isolate.cc

Bug: v8:12676
Change-Id: I0b625e6e0419885cf20758f22d897dc2532c2606
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3497335
Auto-Submit: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79347}

src/execution/isolate.cc

@@ -1846,6 +1846,8 @@ class SetThreadInWasmFlagScope {
 }  // namespace
 
 Object Isolate::UnwindAndFindHandler() {
+  // TODO(v8:12676): Fix gcmole failures in this function.
+  DisableGCMole no_gcmole;
 #if V8_ENABLE_WEBASSEMBLY
   // Create the {SetThreadInWasmFlagScope} first in this function so that its
   // destructor gets called after all the other destructors. It is important