### 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_from_line, text.size());
	ERR_FAIL_INDEX(p_from_column, text[p_from_line].length() + 1);
	ERR_FAIL_INDEX(p_to_line, text.size());
	ERR_FAIL_INDEX(p_to_column, text[p_to_line].length() + 1);
	ERR_FAIL_COND(p_to_line < p_from_line); 
	ERR_FAIL_COND(p_to_line == p_from_line && p_to_column < p_from_column); 
	String pre_text = text[p_from_line].substr(0, p_from_column);
	String post_text = text[p_to_line].substr(p_to_column, text[p_to_line].length());
	text.remove_range(p_from_line, p_to_line);
	text.set(p_from_line, pre_text + post_text, structured_text_parser(st_parser, st_args, pre_text + post_text));
	if (!text_changed_dirty && !setting_text) {
		if (is_inside_tree()) {
			MessageQueue::get_singleton()->push_call(this, "_text_changed_emit");
		}
		text_changed_dirty = true;
	}
	emit_signal(SNAME("lines_edited_from"), p_to_line, p_from_line);
}
TextEdit::TextEdit(const String &p_placeholder) {
	placeholder_data_buf.instantiate();
	carets.push_back(Caret());
	clear();
	set_focus_mode(FOCUS_ALL);
	set_default_cursor_shape(CURSOR_IBEAM);