### 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
locals_indices[p_local->identifier->name] = locals.size();
			locals.push_back(Local(p_local, p_source_function));
		}
		void add_local(const Local &p_local) {
			locals_indices[p_local.name] = locals.size();
			locals.push_back(p_local);
		}
		SuiteNode() {
			type = SUITE;
		}
	};
	struct TernaryOpNode : public ExpressionNode {
		
		ExpressionNode *condition = nullptr;
		ExpressionNode *true_expr = nullptr;
		ExpressionNode *false_expr = nullptr;
		TernaryOpNode() {
			type = TERNARY_OPERATOR;
		}
	};
	struct TypeNode : public Node {
		Vector<IdentifierNode *> type_chain;
		TypeNode *container_type = nullptr;
		TypeNode() {