### 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
} else if (!call->is_super && call->callee->type == GDScriptParser::Node::IDENTIFIER && Variant::has_utility_function(call->function_name)) {
				
				gen->write_call_utility(result, call->function_name, arguments);
			} else if (!call->is_super && call->callee->type == GDScriptParser::Node::IDENTIFIER && GDScriptUtilityFunctions::function_exists(call->function_name)) {
				
				gen->write_call_gdscript_utility(result, call->function_name, arguments);
			} else {
				
				const GDScriptParser::ExpressionNode *callee = call->callee;
				if (call->is_super) {
					
					gen->write_super_call(result, call->function_name, arguments);
				} else {
					if (callee->type == GDScriptParser::Node::IDENTIFIER) {
						
						if (ClassDB::has_method(codegen.script->native->get_name(), call->function_name)) {
							
							GDScriptCodeGenerator::Address self;
							self.mode = GDScriptCodeGenerator::Address::SELF;
							MethodBind *method = ClassDB::get_method(codegen.script->native->get_name(), call->function_name);
							if (_can_use_ptrcall(method, arguments)) {
								
								gen->write_call_ptrcall(result, self, method, arguments);
							} else {
								
								gen->write_call_method_bind(result, self, method, arguments);
							}
						} else if (codegen.is_static || (codegen.function_node && codegen.function_node->is_static) || call->function_name == "new") {
							GDScriptCodeGenerator::Address self;
							self.mode = GDScriptCodeGenerator::Address::CLASS;