### 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
EditorPropertyInteger *editor = memnew(EditorPropertyInteger);
					editor->setup(-100000, 100000, 1, false, true, true);
					prop = editor;
				} break;
				case Variant::FLOAT: {
					EditorPropertyFloat *editor = memnew(EditorPropertyFloat);
					editor->setup(-100000, 100000, default_float_step, true, false, true, true);
					prop = editor;
				} break;
				case Variant::STRING: {
					if (i != amount && property_hint == PROPERTY_HINT_MULTILINE_TEXT) {
						
						
						prop = memnew(EditorPropertyMultilineText);
					} else {
						prop = memnew(EditorPropertyText);
					}
				} break;
				
				case Variant::VECTOR2: {
					EditorPropertyVector2 *editor = memnew(EditorPropertyVector2);
					editor->setup(-100000, 100000, default_float_step, true);
					prop = editor;
				} break;
				case Variant::VECTOR2I: {
					EditorPropertyVector2i *editor = memnew(EditorPropertyVector2i);
					editor->setup(-100000, 100000);
					prop = editor;
				} break;
				case Variant::RECT2: {