### 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
for (int i = 0; i < text.size(); i++) {
		if (p_at < 0 || p_at > gutter_count) {
			text.write[i].gutters.push_back(Gutter());
		} else {
			text.write[i].gutters.insert(p_at, Gutter());
		}
	}
	gutter_count++;
}
void TextEdit::Text::remove_gutter(int p_gutter) {
	for (int i = 0; i < text.size(); i++) {
		text.write[i].gutters.remove_at(p_gutter);
	}
	gutter_count--;
}
void TextEdit::Text::move_gutters(int p_from_line, int p_to_line) {
	text.write[p_to_line].gutters = text[p_from_line].gutters;
	text.write[p_from_line].gutters.clear();
	text.write[p_from_line].gutters.resize(gutter_count);
}
void TextEdit::_notification(int p_what) {