Fix: https://github.com/rails/rails/issues/51386

This significantly reduce the depth of the tree for large `OR`
conditions. I was initially a bit on the fence about that fix,
but given that `And` is already implemented this way, I see no
reasons not to do the same.

Amusingly, the reported repro script now makes SQLite fail:

```ruby
SQLite3::SQLException: Expression tree is too large (maximum depth 1000)
```