### Godot version

v4.0.beta11.official [91713ced8]

### System information

macOS 13.1

### Issue description

When using a function with a return type of `void` as the return value of another function with a return type of `void`, the following error occurs: 
> Cannot get return value of call to "foo()" because it returns "void"

This wasn't a problem in Godot 3.x and Godot 4.x until now. Seems it's related to https://github.com/godotengine/godot/pull/70702. 

I understand why this is happening, but I'd expect to be able to use functions like this that return `void` because they both use the matching return type. It seems overly strict.

In a real world example I use this to return early when switching states in a FSM:

```gdscript
func _process(_delta: float) -> void:
  if player.is_grounded():
    return state_machine.transition_to("ground") # returns void

  if player.is_on_wall():
    return state_machine.transition_to("wall") # returns void
```

### Steps to reproduce

```gdscript
extends Node

func foo() -> void:
	print("hello")

func _ready() -> void:
	return foo()
```

### Minimal reproduction project

[godot_4_return_value_regression.zip](https://github.com/godotengine/godot/files/10385377/godot_4_return_value_regression.zip)

codegen.generator->write_assign_with_conversion(dst_address, src_address);
				} else {
					codegen.generator->write_assign(dst_address, src_address);
				}
				if (src_address.mode == GDScriptCodeGenerator::Address::TEMPORARY) {
					codegen.generator->pop_temporary();
				}
			} else if (field_type.has_type) {
				codegen.generator->write_newline(field->start_line);
				
				if (field_type.has_container_element_type()) {
					codegen.generator->write_construct_typed_array(dst_address, field_type.get_container_element_type(), Vector<GDScriptCodeGenerator::Address>());
				} else if (field_type.kind == GDScriptDataType::BUILTIN) {
					codegen.generator->write_construct(dst_address, field_type.builtin_type, Vector<GDScriptCodeGenerator::Address>());
				}
				
			}
		}
	}
	
	if (p_func) {
		if (optional_parameters > 0) {
			codegen.generator->start_parameters();
			for (int i = p_func->parameters.size() - optional_parameters; i < p_func->parameters.size(); i++) {
				const GDScriptParser::ParameterNode *parameter = p_func->parameters[i];
				GDScriptCodeGenerator::Address src_addr = _parse_expression(codegen, r_error, parameter->initializer);
				if (r_error) {
					memdelete(codegen.generator);
					return nullptr;
				}