### 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
switch (p_statement->type) {
		case Node::ASSERT:
			print_assert(static_cast<AssertNode *>(p_statement));
			break;
		case Node::VARIABLE:
			print_variable(static_cast<VariableNode *>(p_statement));
			break;
		case Node::CONSTANT:
			print_constant(static_cast<ConstantNode *>(p_statement));
			break;
		case Node::IF:
			print_if(static_cast<IfNode *>(p_statement));
			break;
		case Node::FOR:
			print_for(static_cast<ForNode *>(p_statement));
			break;
		case Node::WHILE:
			print_while(static_cast<WhileNode *>(p_statement));
			break;
		case Node::MATCH:
			print_match(static_cast<MatchNode *>(p_statement));