### 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
if (current.get_identifier() == "get" || current.get_identifier() == "set") {
						return parse_property(variable, false);
					}
				}
			}
			
			variable->datatype_specifier = parse_type();
		}
	}
	if (match(GDScriptTokenizer::Token::EQUAL)) {
		
		variable->initializer = parse_expression(false);
		if (variable->initializer == nullptr) {
			push_error(R"(Expected expression for variable initial value after "=".)");
		}
		variable->assignments++;
	}
	if (p_allow_property && match(GDScriptTokenizer::Token::COLON)) {
		if (match(GDScriptTokenizer::Token::NEWLINE)) {
			return parse_property(variable, true);
		} else {
			return parse_property(variable, false);
		}
	}
	complete_extents(variable);
	end_statement("variable declaration");
	return variable;
}
GDScriptParser::VariableNode *GDScriptParser::parse_property(VariableNode *p_variable, bool p_need_indent) {