### Godot version

4.0 stable

### System information

Manjaro Linux, kernel 6.1.1-1-MANJARO, AMD Ryzen 5 3600, AMD RX 580

### Issue description

The `wrap_mode` property of the `TextEdit` node doesn't seem to really do anything. Setting it to `LINE_WRAPPING_BOUNDARY` simply means that there won't be an horizontal scrollbar if the text overshoots the boundary, instead of actually forcing the text to the next line so that it stays visible.

### Steps to reproduce

Create a TextEdit node and set its `wrap_mode` property to `LINE_WRAPPING_BOUNDARY`

### Minimal reproduction project

[WrapBugDemo.zip](https://github.com/godotengine/godot/files/10875969/WrapBugDemo.zip)

setting_text = true;
	if (!undo_enabled) {
		_clear();
		insert_text_at_caret(p_text);
	}
	if (undo_enabled) {
		remove_secondary_carets();
		set_caret_line(0);
		set_caret_column(0);
		begin_complex_operation();
		deselect();
		_remove_text(0, 0, MAX(0, get_line_count() - 1), MAX(get_line(MAX(get_line_count() - 1, 0)).size() - 1, 0));
		insert_text_at_caret(p_text);
		end_complex_operation();
	}
	set_caret_line(0);
	set_caret_column(0);
	queue_redraw();
	setting_text = false;
	emit_signal(SNAME("text_set"));
}
String TextEdit::get_text() const {