### 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)

ERR_FAIL_INDEX(p_line, text.size());
	if (font.is_null()) {
		return; 
	}
	if (p_text_changed) {
		text.write[p_line].data_buf->clear();
	}
	text.write[p_line].data_buf->set_width(width);
	text.write[p_line].data_buf->set_direction((TextServer::Direction)direction);
	text.write[p_line].data_buf->set_preserve_control(draw_control_chars);
	if (p_ime_text.length() > 0) {
		if (p_text_changed) {
			text.write[p_line].data_buf->add_string(p_ime_text, font, font_size, language);
		}
		if (!p_bidi_override.is_empty()) {
			TS->shaped_text_set_bidi_override(text.write[p_line].data_buf->get_rid(), p_bidi_override);
		}
	} else {
		if (p_text_changed) {
			text.write[p_line].data_buf->add_string(text[p_line].data, font, font_size, language);
		}
		if (!text[p_line].bidi_override.is_empty()) {
			TS->shaped_text_set_bidi_override(text.write[p_line].data_buf->get_rid(), text[p_line].bidi_override);
		}
	}