### 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
ERR_FAIL_INDEX_V(p_idx, nodes.size(), NodePath());
	if (nodes[p_idx].parent < 0 || nodes[p_idx].parent == NO_PARENT_SAVED) {
		if (p_for_parent) {
			return NodePath();
		} else {
			return NodePath(".");
		}
	}
	Vector<StringName> sub_path;
	NodePath base_path;
	int nidx = p_idx;
	while (true) {
		if (nodes[nidx].parent == NO_PARENT_SAVED || nodes[nidx].parent < 0) {
			sub_path.insert(0, ".");
			break;
		}
		if (!p_for_parent || p_idx != nidx) {
			sub_path.insert(0, names[nodes[nidx].name]);
		}
		if (nodes[nidx].parent & FLAG_ID_IS_PATH) {
			base_path = node_paths[nodes[nidx].parent & FLAG_MASK];
			break;
		} else {
			nidx = nodes[nidx].parent & FLAG_MASK;
		}
	}
	for (int i = base_path.get_name_count() - 1; i >= 0; i--) {
		sub_path.insert(0, base_path.get_name(i));
	}
	if (sub_path.is_empty()) {