Adding a VM integration test setup for tvix-daemon. This test acts as
our first milestone: implementing enough daemon operations to be able
to add a new store path to tvix-store.
The test is expected to fail for now. We don't want to run it on CI
yet.
Change-Id: I2bd8eb9a07c5de2ef91099e10fcac23c087b880b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11199
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
