Add EVP_MD_do_all

[WillChilds-Klein]

Issues:

Addresses CryptoAlg-2036

Description of changes:

OpenSSL has a function EVP_MD_do_all that works the same way as EVP_MD_do_all_sorted (which AWS-LC currently provides), except that it gives no guarantees on the order in which it calls its input function over the digest collection. Presumably, OpenSSL separates these two functions out for performance reasons, as EVP_MD_do_all_sorted performs a runtime quicksort (see also here) on the collection. AWS-LC does the "sort" manually at build time, so there's no runtime sorting cost and we can just call out to EVP_MD_do_all_sorted in our EVP_MD_do_all implementation.

Call-outs:

n/a

Testing:

• CI testing in this repo
• built my cpython 3.10 fork against this change locally

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