### 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)

if (k->is_action("ui_menu", true)) {
			if (context_menu_enabled) {
				_update_context_menu();
				adjust_viewport_to_caret();
				menu->set_position(get_screen_position() + get_caret_draw_pos());
				menu->reset_size();
				menu->popup();
				menu->grab_focus();
			}
			accept_event();
			return;
		}
		if (k->is_action("ui_text_toggle_insert_mode", true)) {
			set_overtype_mode_enabled(!overtype_mode);
			accept_event();
			return;
		}
		if (k->is_action("ui_swap_input_direction", true)) {
			_swap_current_input_direction();
			accept_event();
			return;
		}
		
		k = k->duplicate();
		bool shift_pressed = k->is_shift_pressed();
		
		k->set_shift_pressed(false);
		
		if (k->is_action("ui_text_caret_word_left", true)) {
			_move_caret_left(shift_pressed, true);