cms: remove the use of KeyWrap, use Kek directly

[baloo]

This brings a merge of origin/master because const-oid got bumped, ideally the whole branch needs a rebase.

Only the last commit is required here.

[baloo]

the merge is required because of the const-oid version requirement that RustCrypto/key-wraps#39 brings.

[nemynm]

I think key-wraps crate got some re-factoring that changed its API yesterday, should I just recreate a clean feature branch?

[baloo]

yeah that moved yesterday morning. I'll update that branch.

[nemynm]

Should we update for latest aes-kw changes here or merge and do it after?

[baloo]

We can do that here, but it'd be nice if you could rebase the keywrap-trait branch

[nemynm]

We can do that here, but it'd be nice if you could rebase the keywrap-trait branch

sure I'll do it, favor "rebase" rebase or "merge" rebase?

[baloo]

I meant rebase rebase

[nemynm]

Rebase it is!