testexecserver: Hook up tauto driver to testexecserver

Hook up tauto driver to testexecserver. The testexeserver can run tauto
tests now, but it will get an error like this:

2021/06/23 20:42:58 [tauto] 13:42:58 INFO | Finished running tests. Results can be found in /tmp/results/autotest/20210623-134237 or /tmp/test_that_latest
failed to unmarshal results: unexpected end of JSON inp

We will address this issure with different CL

BUG=b:191800994
TEST=./fast_build.sh; ./fast_build.sh -T; testexecserver -input ./src/chromiumos/test/execution/data/tauto.json -driver=tauto -output result.json -tlwaddr=

Change-Id: Ib2d20911e9d9b0450a8e85c196abddbf38b2e3eb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2983656
Commit-Queue: Seewai Fu <seewaifu@google.com>
Tested-by: Seewai Fu <seewaifu@google.com>
Reviewed-by: Derek Beckett <dbeckett@chromium.org>
Reviewed-by: Jaques Clapauch <jaquesc@google.com>
3 files changed