### Godot version

9f12e7b52d944

### System information

arch linux

### Issue description

Attempting to edit from the editor a typed array exported from a tool script fails, any value is immediately reset, setters are never called.

### Steps to reproduce

Create a script such as follows and try to add and then change items of the array in the inspector.


```gdscript
@tool
extends Node

@export var x: Array[String]
```

### Minimal reproduction project

n/a
case Variant::PACKED_FLOAT64_ARRAY: {
					EditorPropertyArray *editor = memnew(EditorPropertyArray);
					editor->setup(Variant::PACKED_FLOAT64_ARRAY);
					prop = editor;
				} break;
				case Variant::PACKED_STRING_ARRAY: {
					EditorPropertyArray *editor = memnew(EditorPropertyArray);
					editor->setup(Variant::PACKED_STRING_ARRAY);
					prop = editor;
				} break;
				case Variant::PACKED_VECTOR2_ARRAY: {
					EditorPropertyArray *editor = memnew(EditorPropertyArray);
					editor->setup(Variant::PACKED_VECTOR2_ARRAY);
					prop = editor;
				} break;
				case Variant::PACKED_VECTOR3_ARRAY: {
					EditorPropertyArray *editor = memnew(EditorPropertyArray);
					editor->setup(Variant::PACKED_VECTOR3_ARRAY);
					prop = editor;
				} break;
				case Variant::PACKED_COLOR_ARRAY: {
					EditorPropertyArray *editor = memnew(EditorPropertyArray);
					editor->setup(Variant::PACKED_COLOR_ARRAY);
					prop = editor;
				} break;
				default: {
				}
			}
			ERR_FAIL_COND(!prop);
			prop->set_read_only(is_read_only());