Remove PartialEq between &str/String and Addr

[webmaster128]

When one of the sides is not normalized you can get unintended results. E.g.

fn my_func(deps: Deps, user_provided_address: &str) {

   let existing_address: Addr = CONFIG.load(deps.storage)?.blocked;

   if user_provided_address != blocked {
        return Err(ContractError::Unauthorized);
   }
}

Now if blocked is cosmos1jhg0e7s6gn44tfc5k37kr04sznyhedtc9rzys5 and user_provided_address is cosmos1jhg0e7s6gn44tfc5k37kr04sznyhedtc9rzys5 the check works fine. But if the perfectly valid form COSMOS1JHG0E7S6GN44TFC5K37KR04SZNYHEDTC9RZYS5 is provided, this breaks.

I'm sure the example is bad here but I hope you get what I mean. Equality checkes between Addr and &str or String are just not safe.