### 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)

CHECK_FALSE(text_edit->has_selection(0));
			CHECK(text_edit->get_caret_line(1) == 3);
			CHECK(text_edit->get_caret_column(1) == 0);
			CHECK_FALSE(text_edit->has_selection(1));
			SIGNAL_CHECK_FALSE("caret_changed");
			SIGNAL_CHECK_FALSE("text_changed");
			SIGNAL_CHECK_FALSE("lines_edited_from");
			text_edit->set_editable(true);
		}
		SUBCASE("[TextEdit] ui_text_backspace_all_to_left") {
			text_edit->set_text("\nthis is some test text.\n\nthis is some test text.");
			text_edit->select(1, 0, 1, 4);
			text_edit->set_caret_line(1);
			text_edit->set_caret_column(4);
			text_edit->add_caret(3, 4);
			text_edit->select(3, 0, 3, 4, 1);
			CHECK(text_edit->get_caret_count() == 2);
			MessageQueue::get_singleton()->flush();
			Ref<InputEvent> tmpevent = InputEventKey::create_reference(Key::BACKSPACE | KeyModifierMask::ALT | KeyModifierMask::CMD_OR_CTRL);
			InputMap::get_singleton()->action_add_event("ui_text_backspace_all_to_left", tmpevent);
			SIGNAL_DISCARD("text_set");
			SIGNAL_DISCARD("text_changed");
			SIGNAL_DISCARD("lines_edited_from");
			SIGNAL_DISCARD("caret_changed");
			
			Array args2;
			args2.push_back(3);
			args2.push_back(3);
			lines_edited_args.push_front(args2);