### 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
return multi_carets_enabled;
}
int TextEdit::add_caret(int p_line, int p_col) {
	if (!multi_carets_enabled) {
		return -1;
	}
	p_line = CLAMP(p_line, 0, text.size() - 1);
	p_col = CLAMP(p_col, 0, get_line(p_line).length());
	for (int i = 0; i < carets.size(); i++) {
		if (get_caret_line(i) == p_line && get_caret_column(i) == p_col) {
			return -1;
		}
		if (has_selection(i)) {
			if (p_line >= get_selection_from_line(i) && p_line <= get_selection_to_line(i) && (p_line > get_selection_from_line(i) || p_col >= get_selection_from_column(i)) && (p_line < get_selection_to_line(i) || p_col <= get_selection_to_column(i))) {
				return -1;
			}
		}
	}
	carets.push_back(Caret());
	set_caret_line(p_line, false, false, 0, carets.size() - 1);
	set_caret_column(p_col, false, carets.size() - 1);
	caret_index_edit_dirty = true;
	return carets.size() - 1;
}
void TextEdit::remove_caret(int p_caret) {