bump(imagebuilder): Some COPY --from statements would fail

A dockerfile with

```
FROM a AS a
RUN mkdir -p /a/b && touch /a/b/1
FROM b
COPY --from=a /a/b/* /a
```

would fail with an lstat error because we were not properly handling
wildcards on archives. Added more tests and verified the included
scenarios were correct.

Author: smarterclayton