## Bug description

Creating a selector with an attribute isn't working at all.

`[data-attr="bla"]`

## Expected behavior

It should work

## How to reproduce

1. Create action
2. Add an attribute in the selector
3. 


## Additional context

The reason for this is that we store the attributes as `attr__data-attr` but we do not add `attr__` in the filtering. I am working on a solution.


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posthog/test/test_event_model.py
selector1 = Selector("div > span")
        self.assertEqual(
            selector1.parts[0].__dict__, {"data": {"tag_name": "span"}, "direct_descendant": False, "unique_order": 0,},
        )
        self.assertEqual(
            selector1.parts[1].__dict__, {"data": {"tag_name": "div"}, "direct_descendant": True, "unique_order": 0},
        )
    def test_selector_attribute(self):
        selector1 = Selector('div[data-id="5"] > span')
        self.assertEqual(
            selector1.parts[0].__dict__, {"data": {"tag_name": "span"}, "direct_descendant": False, "unique_order": 0,},
        )
        self.assertEqual(
            selector1.parts[1].__dict__,
            {"data": {"tag_name": "div", "attributes__data-id": "5"}, "direct_descendant": True, "unique_order": 0,},
        )
    def test_selector_id(self):
        selector1 = Selector('[id="5"] > span')
        self.assertEqual(
            selector1.parts[0].__dict__, {"data": {"tag_name": "span"}, "direct_descendant": False, "unique_order": 0,},
        )
        self.assertEqual(
            selector1.parts[1].__dict__, {"data": {"attr_id": "5"}, "direct_descendant": True, "unique_order": 0},
        )
    def test_class(self):