Make associativity a property of operator precedence (#11065)
## Summary
This PR does a few things but the main change is that is makes
associativity a property of operator precedence.
1. Rename `Precedence` -> `OperatorPrecedence`
2. Rename `parse_expression_with_precedence` ->
`parse_binary_expression_or_higher`
3. Move `current_binding_power` to `OperatorPrecedence::try_from_tokens`
[^1]
4. Add a `OperatorPrecedence::is_right_associative` method
5. Move from `increment_precedence` to using `<=` / `<` to check if the
parsing loop needs to stop [^2]
[^1]: Another alternative would be to have two separate methods to avoid
lookahead as it's required only for once case (`not in`). So,
`try_from_current_token(current).or_else(|| try_from_next_token(current,
peek))`
[^2]: This will allow us to easily make the refactors mentioned in
#10752
## Test Plan
Make sure the precedence parsing algorithm is still correct by running
the test suite, fuzz testing it and running it against a dozen or so
open-source repositories.
