### 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
for (const AnnotationNode *E : p_variable->annotations) {
		print_annotation(E);
	}
	push_text("Variable ");
	print_identifier(p_variable->identifier);
	push_text(" : ");
	if (p_variable->datatype_specifier != nullptr) {
		print_type(p_variable->datatype_specifier);
	} else if (p_variable->infer_datatype) {
		push_text("<inferred type>");
	} else {
		push_text("Variant");
	}
	increase_indent();
	push_line();
	push_text("= ");
	if (p_variable->initializer == nullptr) {
		push_text("<default value>");
	} else {
		print_expression(p_variable->initializer);
	}
	push_line();
	if (p_variable->property != VariableNode::PROP_NONE) {
		if (p_variable->getter != nullptr) {
			push_text("Get");