The new container just provides a standard debian box with a
rust toolchain.
Installation of dependencies has been extracted into scripts
which can also be used to set up a machine for development.
This will replace the current ./ci/ containers.
BUG=b:199950887,b:199950423
TEST=./tools/dev_container ./tools/run_tests
Change-Id: I832bc5b129246923df937a34614b4d74955304dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3221781
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dennis Kempin <denniskempin@google.com>
Reviewed-by: Junichi Uekawa <uekawa@chromium.org>
