### 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
if (!is_dirty) {
		return;
	}
	max_width = -1;
	line_height = -1;
	if (font.is_valid() && font_size > 0) {
		font_height = font->get_height(font_size);
	}
	for (int i = 0; i < text.size(); i++) {
		invalidate_cache(i, -1, true);
	}
	is_dirty = false;
}
void TextEdit::Text::clear() {
	text.clear();
	max_width = -1;
	line_height = -1;
	Line line;
	line.gutters.resize(gutter_count);
	line.data = "";
	text.insert(0, line);
	invalidate_cache(0, -1, true);
}
int TextEdit::Text::get_max_width() const {
	return max_width;
}
void TextEdit::Text::set(int p_line, const String &p_text, const Array &p_bidi_override) {