### 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
saved_version = 0;
	current_op.type = TextOperation::TYPE_NONE;
	undo_stack_pos = nullptr;
	undo_stack.clear();
}
bool TextEdit::is_insert_text_operation() const {
	return (current_op.type == TextOperation::TYPE_INSERT || current_action == EditAction::ACTION_TYPING);
}
void TextEdit::tag_saved_version() {
	saved_version = get_version();
}
uint32_t TextEdit::get_version() const {
	return current_op.version;
}
uint32_t TextEdit::get_saved_version() const {
	return saved_version;
}
void TextEdit::set_search_text(const String &p_search_text) {
	search_text = p_search_text;
}
void TextEdit::set_search_flags(uint32_t p_flags) {
	search_flags = p_flags;
}
Point2i TextEdit::search(const String &p_key, uint32_t p_search_flags, int p_from_line, int p_from_column) const {