python3: Use raw_io.output_text()

Replace raw_io.output() with raw_io.output_text() and
raw_io.stream_output() with raw_io.stream_output_text(). All uses of
these are using strings and not bytes anyway.

Change-Id: Iff943e0b0b579e79a4058e7dcb5e59283a6192de
Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/58741
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Oliver Newman <olivernewman@google.com>
59 files changed