### 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 (p_is_elif) {
		push_text("Elif ");
	} else {
		push_text("If ");
	}
	print_expression(p_if->condition);
	push_line(" :");
	increase_indent();
	print_suite(p_if->true_block);
	decrease_indent();
	
	if (p_if->false_block != nullptr) {
		push_line("Else :");
		increase_indent();
		print_suite(p_if->false_block);
		decrease_indent();
	}
}
void GDScriptParser::TreePrinter::print_lambda(LambdaNode *p_lambda) {
	print_function(p_lambda->function, "Lambda");
	push_text("| captures [ ");
	for (int i = 0; i < p_lambda->captures.size(); i++) {
		if (i > 0) {
			push_text(" , ");
		}
		push_text(p_lambda->captures[i]->name.operator String());
	}
	push_line(" ]");
}
void GDScriptParser::TreePrinter::print_literal(LiteralNode *p_literal) {