### Godot version

4.2 f7bc653

### System information

Windows 10.0.19045 - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 1060 (NVIDIA; 30.0.15.1403) - Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 Threads)

### Issue description

`get_method()`:
```
Returns the name of the method represented by this Callable. If the callable is a lambda function, returns the function's name
```
However calling it on a named lambda results in
```
Can't get method on CallableCustom "test(lambda)".
```
(ironically the error even contains the function's name...)

`get_method()` in GDScriptLambdaCallable is likely unimplemented or is wrong. It should work for named lambdas.

### Steps to reproduce

```GDScript
var fun = func test(): pass
print(fun.get_method())
```

### Minimal reproduction project

N/A
return compare_less;
}
ObjectID GDScriptLambdaSelfCallable::get_object() const {
	return object->get_instance_id();
}
void GDScriptLambdaSelfCallable::call(const Variant **p_arguments, int p_argcount, Variant &r_return_value, Callable::CallError &r_call_error) const {
#ifdef DEBUG_ENABLED
	if (object->get_script_instance() == nullptr || object->get_script_instance()->get_language() != GDScriptLanguage::get_singleton()) {
		ERR_PRINT("Trying to call a lambda with an invalid instance.");
		r_call_error.error = Callable::CallError::CALL_ERROR_INSTANCE_IS_NULL;
		return;
	}
#endif
	int captures_amount = captures.size();
	if (captures_amount > 0) {
		Vector<const Variant *> args;
		args.resize(p_argcount + captures_amount);
		for (int i = 0; i < captures_amount; i++) {
			args.write[i] = &captures[i];
		}
		for (int i = 0; i < p_argcount; i++) {
			args.write[i + captures_amount] = p_arguments[i];
		}
		r_return_value = function->call(static_cast<GDScriptInstance *>(object->get_script_instance()), args.ptrw(), args.size(), r_call_error);
		r_call_error.argument -= captures_amount;
	} else {
		r_return_value = function->call(static_cast<GDScriptInstance *>(object->get_script_instance()), p_arguments, p_argcount, r_call_error);
	}
}
GDScriptLambdaSelfCallable::GDScriptLambdaSelfCallable(Ref<RefCounted> p_self, GDScriptFunction *p_function, const Vector<Variant> &p_captures) {