### 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
ERR_FAIL_INDEX(p_gutter, gutters.size());
	gutters.remove_at(p_gutter);
	text.remove_gutter(p_gutter);
	_update_gutter_width();
	emit_signal(SNAME("gutter_removed"));
	queue_redraw();
}
int TextEdit::get_gutter_count() const {
	return gutters.size();
}
void TextEdit::set_gutter_name(int p_gutter, const String &p_name) {
	ERR_FAIL_INDEX(p_gutter, gutters.size());
	gutters.write[p_gutter].name = p_name;
}
String TextEdit::get_gutter_name(int p_gutter) const {
	ERR_FAIL_INDEX_V(p_gutter, gutters.size(), "");
	return gutters[p_gutter].name;
}
void TextEdit::set_gutter_type(int p_gutter, GutterType p_type) {
	ERR_FAIL_INDEX(p_gutter, gutters.size());
	if (gutters[p_gutter].type == p_type) {
		return;
	}
	gutters.write[p_gutter].type = p_type;
	queue_redraw();
}
TextEdit::GutterType TextEdit::get_gutter_type(int p_gutter) const {