Auto merge of #8077 - faern:use-assoc-int-consts, r=ehuss

Auto merge of #8077 - faern:use-assoc-int-consts, r=ehuss

Use associated constants directly on primitive types instead of modules

This PR is in no way critical. It's more of a code cleanup. It comes as a result of me making https://github.com/rust-lang/rust/pull/70857 and search-and-replacing all usage of the soft-deprecated ways of reaching primitive type constants.

It makes the code slightly shorter, that's basically it. And showcases the recommended way of reaching these consts on new code :)