### Godot version

v4.0.3.stable.official [5222a99f5]
Master [6101240231600c871f5c5473872532c68ea3268c] (confirmed by https://github.com/godotengine/godot/issues/77666#issuecomment-1568952502)

### System information

Window 10

### Issue description

References are not unreferenced at the end of `if` scopes.

### Steps to reproduce

Copy, paste and run the snippet below, check the results:

```gdscript
extends Node


func _ready() -> void:
  var ref := RefCounted.new()
  var ref_count : int

  # OK
  ref_count = ref.get_reference_count()
  print('Expected: 1, Result: %d' % ref_count)

  # OK
  if true:
    var temp := ref
    temp = null

  ref_count = ref.get_reference_count()
  print('Expected: 1, Result: %d' % ref_count)

  # FAIL
  if true:
    var temp := ref

  ref_count = ref.get_reference_count()
  print('Expected: 1, Result: %d' % ref_count)
```

Output example:

```
Expected: 1, Result: 1
Expected: 1, Result: 1
Expected: 1, Result: 2
```

### Minimal reproduction project

N/A
default:
						break;
				}
				push_error(vformat(R"(Expected node path as string or identifier after "%s".)", previous_token));
				complete_extents(get_node);
				return nullptr;
			}
			get_node->full_path += previous.literal.operator String();
			path_state = PATH_STATE_NODE_NAME;
		} else if (current.is_node_name()) {
			advance();
			String identifier = previous.get_identifier();
#ifdef DEBUG_ENABLED
			
			if (TS->has_feature(TextServer::FEATURE_UNICODE_SECURITY) && TS->spoof_check(identifier)) {
				push_warning(get_node, GDScriptWarning::CONFUSABLE_IDENTIFIER, identifier);
			}
#endif
			get_node->full_path += identifier;
			path_state = PATH_STATE_NODE_NAME;
		} else if (!check(GDScriptTokenizer::Token::SLASH) && !check(GDScriptTokenizer::Token::PERCENT)) {
			push_error(vformat(R"(Unexpected "%s" in node path.)", current.get_name()));
			complete_extents(get_node);
			return nullptr;
		}
	} while (match(GDScriptTokenizer::Token::SLASH) || match(GDScriptTokenizer::Token::PERCENT));
	complete_extents(get_node);
	return get_node;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_preload(ExpressionNode *p_previous_operand, bool p_can_assign) {