### Godot version

4.0.beta13 (caacade56)

### System information

Windows 10

### Issue description

Seems like this was missed in #62011 and #70540. `@export_multiline` should also support the PackedStringArray datatype on top of Array[String] and Dictionary, but it doesn't, instead giving the error `"@export_multiline" annotation requires a variable of type "String" but type "PackedStringArray" was given instead.`

### Steps to reproduce

Create a PackedStringArray with the `@export_multiline` annotation.
```gdscript
@export_multiline var npc_dialog: PackedStringArray
```

### Minimal reproduction project

N/A
EditorPropertyTransform2D *editor = memnew(EditorPropertyTransform2D);
					editor->setup(-100000, 100000, default_float_step, true);
					prop = editor;
				} break;
				case Variant::PLANE: {
					EditorPropertyPlane *editor = memnew(EditorPropertyPlane);
					editor->setup(-100000, 100000, default_float_step, true);
					prop = editor;
				} break;
				case Variant::QUATERNION: {
					EditorPropertyQuaternion *editor = memnew(EditorPropertyQuaternion);
					editor->setup(-100000, 100000, default_float_step, true);
					prop = editor;
				} break;
				case Variant::AABB: {
					EditorPropertyAABB *editor = memnew(EditorPropertyAABB);
					editor->setup(-100000, 100000, default_float_step, true);
					prop = editor;
				} break;
				case Variant::BASIS: {
					EditorPropertyBasis *editor = memnew(EditorPropertyBasis);
					editor->setup(-100000, 100000, default_float_step, true);
					prop = editor;
				} break;
				case Variant::TRANSFORM3D: {
					EditorPropertyTransform3D *editor = memnew(EditorPropertyTransform3D);
					editor->setup(-100000, 100000, default_float_step, true);
					prop = editor;
				} break;
				case Variant::PROJECTION: {