### Godot version

4.1

### System information

Windows

### Issue description

Being able to have multiple cursors similarly to vscode is a great feature, however it's only possible to add carets, not remove them. By left clicking you can remove all extra cursors but you cannot remove a specific one so after selecting multiple lines a single missclick, you have to reselect them all again. Looking at the original pr there was a remove_caret function added so it would make sense to be able to remove carets when clicking again, like in vscode.

![image](https://github.com/godotengine/godot/assets/19669673/3867c00e-9faa-4429-9c6d-f2d6d3883044)


### Steps to reproduce

- Alt click to add multiple carets
- Alt click on the same position again
- Nothing happens

### Minimal reproduction project

N/A
if (p_from_line == p_to_line) {
		return;
	}
	bool dirty_height = false;
	bool dirty_width = false;
	for (int i = p_from_line; i < p_to_line; i++) {
		if (!dirty_height && text[i].height == line_height) {
			dirty_height = true;
		}
		if (!dirty_width && text[i].width == max_width) {
			dirty_width = true;
		}
		if (dirty_height && dirty_width) {
			break;
		}
	}
	int diff = (p_to_line - p_from_line);
	for (int i = p_to_line; i < text.size() - 1; i++) {
		text.write[(i - diff) + 1] = text[i + 1];
	}
	text.resize(text.size() - diff);
	if (dirty_height) {
		_calculate_line_height();
	}
	if (dirty_width) {
		_calculate_max_line_width();
	}
}
void TextEdit::Text::add_gutter(int p_at) {