### 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 (const int &i : caret_edit_order) {
		if (p_caret != -1 && p_caret != i) {
			continue;
		}
		int cc = get_caret_column(i);
		int cl = get_caret_line(i);
		if (cc == 0 && cl == 0) {
			continue;
		}
		int prev_line = cc ? cl : cl - 1;
		int prev_column = cc ? (cc - 1) : (text[cl - 1].length());
		merge_gutters(prev_line, cl);
		if (_is_line_hidden(cl)) {
			_set_line_as_hidden(prev_line, true);
		}
		_remove_text(prev_line, prev_column, cl, cc);
		set_caret_line(prev_line, false, true, 0, i);
		set_caret_column(prev_column, i == 0, i);
		adjust_carets_after_edit(i, prev_line, prev_column, cl, cc);
	}
	merge_overlapping_carets();
	end_complex_operation();
}
void TextEdit::_cut_internal(int p_caret) {
	ERR_FAIL_COND(p_caret > carets.size());
	if (!editable) {
		return;
	}
	if (has_selection(p_caret)) {
		DisplayServer::get_singleton()->clipboard_set(get_selected_text(p_caret));