streams: Add DataStream without ser-type and ser-version

Summary:
The moved parts can be reviewed with "--color-moved=dimmed-zebra".
The one-char changes can be reviewed with "--word-diff-regex=.".

This is a partial backport of core#26258
https://github.com/bitcoin/bitcoin/pull/25296/commits/fa9becfe1cea5040e7cea36324d1b0789cbbd25d

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D18947