### 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_V(p_gutter, gutters.size(), GUTTER_TYPE_STRING);
	return gutters[p_gutter].type;
}
void TextEdit::set_gutter_width(int p_gutter, int p_width) {
	ERR_FAIL_INDEX(p_gutter, gutters.size());
	if (gutters[p_gutter].width == p_width) {
		return;
	}
	gutters.write[p_gutter].width = p_width;
	_update_gutter_width();
}
int TextEdit::get_gutter_width(int p_gutter) const {
	ERR_FAIL_INDEX_V(p_gutter, gutters.size(), -1);
	return gutters[p_gutter].width;
}
int TextEdit::get_total_gutter_width() const {
	return gutters_width + gutter_padding;
}
void TextEdit::set_gutter_draw(int p_gutter, bool p_draw) {
	ERR_FAIL_INDEX(p_gutter, gutters.size());
	if (gutters[p_gutter].draw == p_draw) {
		return;
	}
	gutters.write[p_gutter].draw = p_draw;
	_update_gutter_width();
}
bool TextEdit::is_gutter_drawn(int p_gutter) const {