bootperf: use tast for bootperf and showbootdata

This change switches the backend of bootperf and showbootdata from
the autotest "platform_BootPerfServer.bootperf" to tast
"platform.BootPerf". The script bootperf is de-shelled with a rewrite
using python3.

The files under bootperf-bin are moved from
src/third_party/autotest/files/site_utils because the scripts no longer
runs Tauto. The change that removes the copy is in
https://crrev.com/c/2638838.

BUG=b:166744231
TEST=sudo emerge cros-testutils
TEST=bootperf $IP_ADDR
TEST=showbootdata

Cq-Depend: chromium:2638838
Change-Id: Ie12feff374417850f18994082ca6bb639475faf4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/2617379
Reviewed-by: Kevin Shelton <kmshelton@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Kuang-che Wu <kcwu@chromium.org>
Tested-by: Chinglin Yu <chinglinyu@chromium.org>
Commit-Queue: Chinglin Yu <chinglinyu@chromium.org>
8 files changed