build_report: add payload types to BuildArtifact

This changes reserves the 4xx proto-space for payload related types, and
adds the two fields "PAYLOAD_FULL" and "PAYLOAD_DELTA".

BUG=b:206154671
TEST=./generate.sh

Change-Id: I72697225c890c32ca4d1b74cd4ba558cf5cb7393
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/infra/proto/+/3318528
Reviewed-by: George Engelbrecht <engeg@google.com>
Reviewed-by: Sean McAllister <smcallis@google.com>
Reviewed-by: Greg Edelston <gredelston@google.com>
Reviewed-by: Arthur Bello <artbello@google.com>
Commit-Queue: Benjamin Shai <bshai@google.com>
3 files changed