### 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
int start_block = p_line.rfind("[codeblock]");
	int end_block = p_line.rfind("[/codeblock]");
	if (start_block != -1 && r_block_begins) {
		*r_block_begins = start_block;
	}
	if (p_already_in) {
		if (end_block == -1) {
			return true;
		} else if (start_block == -1) {
			return false;
		} else {
			return start_block > end_block;
		}
	} else {
		if (start_block == -1) {
			return false;
		} else if (end_block == -1) {
			return true;
		} else {
			return start_block > end_block;
		}
	}
}
bool GDScriptParser::has_comment(int p_line) {