### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
- [X] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a feature request that matches the one I want to file, without success.

### Electron Version

12.0.1

### What operating system are you using?

macOS

### Operating System Version

11.2

### What arch are you using?

x64

### Last Known Working Electron version

_No response_

### Expected Behavior

`error.message` shouldn't be prefixed with "Uncaught Error:"

### Actual Behavior

`error.message` is prefixed with "Uncaught Error:" when an error is thrown in a function defined in the preload script and caught in the renderer process. This only happens when `contextIsolation` is enabled.

### Testcase Gist URL

https://gist.github.com/f11c77f9bc2cbf98d42a9fcaf477c80a


shell/renderer/api/electron_api_context_bridge.cc
calling_context, data, context_bridge::kProxyFunctionPrivateKey);
  v8::Local<v8::Value> func_value;
  if (sdp_value.IsEmpty() || maybe_func.IsEmpty() ||
      !gin::ConvertFromV8(args.isolate(), sdp_value.ToLocalChecked(),
                          &support_dynamic_properties) ||
      !maybe_func.ToLocal(&func_value))
    return;
  v8::Local<v8::Function> func = v8::Local<v8::Function>::Cast(func_value);
  v8::Local<v8::Context> func_owning_context = func->CreationContext();
  {
    v8::Context::Scope func_owning_context_scope(func_owning_context);
    context_bridge::ObjectCache object_cache;
    std::vector<v8::Local<v8::Value>> original_args;
    std::vector<v8::Local<v8::Value>> proxied_args;
    args.GetRemaining(&original_args);
    for (auto value : original_args) {
      auto arg =
          PassValueToOtherContext(calling_context, func_owning_context, value,
                                  &object_cache, support_dynamic_properties, 0);
      if (arg.IsEmpty())
        return;
      proxied_args.push_back(arg.ToLocalChecked());
    }
    v8::MaybeLocal<v8::Value> maybe_return_value;
    bool did_error = false;
    std::string error_message;
    {
      v8::TryCatch try_catch(args.isolate());
      maybe_return_value = func->Call(func_owning_context, func,
                                      proxied_args.size(), proxied_args.data());