### 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
permission_args++;
				rpc_config["rpc_mode"] = MultiplayerAPI::RPC_MODE_ANY_PEER;
			} else if (arg == "authority") {
				permission_args++;
				rpc_config["rpc_mode"] = MultiplayerAPI::RPC_MODE_AUTHORITY;
			} else if (arg == "reliable") {
				transfer_mode_args++;
				rpc_config["transfer_mode"] = MultiplayerPeer::TRANSFER_MODE_RELIABLE;
			} else if (arg == "unreliable") {
				transfer_mode_args++;
				rpc_config["transfer_mode"] = MultiplayerPeer::TRANSFER_MODE_UNRELIABLE;
			} else if (arg == "unreliable_ordered") {
				transfer_mode_args++;
				rpc_config["transfer_mode"] = MultiplayerPeer::TRANSFER_MODE_UNRELIABLE_ORDERED;
			} else {
				push_error(R"(Invalid RPC argument. Must be one of: "call_local"/"call_remote" (local calls), "any_peer"/"authority" (permission), "reliable"/"unreliable"/"unreliable_ordered" (transfer mode).)", p_annotation);
			}
		}
		if (locality_args > 1) {
			push_error(R"(Invalid RPC config. The locality ("call_local"/"call_remote") must be specified no more than once.)", p_annotation);
		} else if (permission_args > 1) {
			push_error(R"(Invalid RPC config. The permission ("any_peer"/"authority") must be specified no more than once.)", p_annotation);
		} else if (transfer_mode_args > 1) {
			push_error(R"(Invalid RPC config. The transfer mode ("reliable"/"unreliable"/"unreliable_ordered") must be specified no more than once.)", p_annotation);
		}
	}
	function->rpc_config = rpc_config;
	return true;
}
bool GDScriptParser::static_unload_annotation(const AnnotationNode *p_annotation, Node *p_target) {