[roll] Roll third_party/pigweed pw_trace_tokenized: Add type annotations to trace_tokenized.py

Also:
* Update varint_decode() to raise on error, since nothing was checking
  for None return anyway.
* Fix bug in create_trace_event() not converting flags to int.
* Remove the externally-unused get_trace_data_from_file().
* Fix a default values for trace_id, data in parse_trace_event() as they
  cannot be None.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/438372
Original-Revision: d363390068ff244936736fbad1e53e7099e5cc1a

Rolled-Repo: https://fuchsia.googlesource.com/third_party/pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 0e242cb6100e16..d363390068ff24
Roller-URL: https://cr-buildbucket.appspot.com/build/8675653089286832065
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I60e4550eceb4a924d724f4e9b52f81d894bd8c50
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1716800
Commit-Queue: global-integration-roller@fuchsia-infra.iam.gserviceaccount.com <global-integration-roller@fuchsia-infra.iam.gserviceaccount.com>