Consolidates the utility scripts from bin/ into tools/.
Adds a 'presubmit' utility script to run a set of checks and
tests.
This won't be a git hook, but can be manually used to verify
changes before uploading.
BUG=b:199951064
TEST=./tools/presubmit --quick
./tools/dev_container ./tools/presubmit
Change-Id: Iac7c11fca0beaa6d4f214319149ef385fa5ced70
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3225139
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dennis Kempin <denniskempin@google.com>
