Hash and Hmac should return Buffer not TypedArray

[Sytten]

Node specifies that Hash and Hmac digest function should return a Buffer.
Right now they return a TypedArray which is wrong.
We should fix that with the refactor in #1292

[Aditya7880900936]

This makes sense — returning a TypedArray here seems inconsistent with the Node API expectations, especially given that Buffer is the documented return type.

Since this looks related to the refactor in #1292, I can take a look at updating hash and hmac to return Buffer instead of TypedArray, and make sure any downstream usages/tests are adjusted accordingly.

If that sounds good, I’m happy to put together a PR.

[Sytten]

Its a two line change, we need to wait for the modular crypto to land. It was mostly a reminder for ourselves, all good.