### 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
}
		if (!match(GDScriptTokenizer::Token::IDENTIFIER)) {
			break;
		}
		function = parse_identifier();
	}
	complete_extents(p_variable);
	if (p_variable->property == VariableNode::PROP_SETGET) {
		end_statement("property declaration");
	}
	if (p_need_indent) {
		consume(GDScriptTokenizer::Token::DEDENT, R"(Expected end of indented block for property.)");
	}
	return property;
}
void GDScriptParser::parse_property_setter(VariableNode *p_variable) {
	switch (p_variable->property) {
		case VariableNode::PROP_INLINE: {
			FunctionNode *function = alloc_node<FunctionNode>();
			IdentifierNode *identifier = alloc_node<IdentifierNode>();
			complete_extents(identifier);
			identifier->name = "@" + p_variable->identifier->name + "_setter";
			function->identifier = identifier;
			function->is_static = p_variable->is_static;
			consume(GDScriptTokenizer::Token::PARENTHESIS_OPEN, R"(Expected "(" after "set".)");
			ParameterNode *parameter = alloc_node<ParameterNode>();
			if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected parameter name after "(".)")) {
				reset_extents(parameter, previous);
				p_variable->setter_parameter = parse_identifier();
				parameter->identifier = p_variable->setter_parameter;