### 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::TRANSFORM3D: {
			EditorPropertyTransform3D *editor = memnew(EditorPropertyTransform3D);
			EditorPropertyRangeHint hint = _parse_range_hint(p_hint, p_hint_text, default_float_step);
			editor->setup(hint.min, hint.max, hint.step, hint.hide_slider, hint.suffix);
			return editor;
		} break;
		case Variant::PROJECTION: {
			EditorPropertyProjection *editor = memnew(EditorPropertyProjection);
			EditorPropertyRangeHint hint = _parse_range_hint(p_hint, p_hint_text, default_float_step);
			editor->setup(hint.min, hint.max, hint.step, hint.hide_slider, hint.suffix);
			return editor;
		} break;
		
		case Variant::COLOR: {
			EditorPropertyColor *editor = memnew(EditorPropertyColor);
			editor->setup(p_hint != PROPERTY_HINT_COLOR_NO_ALPHA);
			return editor;
		} break;
		case Variant::STRING_NAME: {
			if (p_hint == PROPERTY_HINT_ENUM || p_hint == PROPERTY_HINT_ENUM_SUGGESTION) {
				EditorPropertyTextEnum *editor = memnew(EditorPropertyTextEnum);
				Vector<String> options = p_hint_text.split(",", false);
				editor->setup(options, true, (p_hint == PROPERTY_HINT_ENUM_SUGGESTION));
				return editor;
			} else {
				EditorPropertyText *editor = memnew(EditorPropertyText);
				if (p_hint == PROPERTY_HINT_PLACEHOLDER_TEXT) {
					editor->set_placeholder(p_hint_text);
				} else if (p_hint == PROPERTY_HINT_PASSWORD) {
					editor->set_secret(true);