Search hierarchically for imported object files

Previously an imported object file:
```
implementation module test.test

import code from "obj.o"
```

Would only search in the roots of the project paths. Now it will als
search in the test/ folder in the root.
1 job for object-file-search-hierarchical in 58 seconds
Status Job ID Name Coverage
  Test
passed #48171
test

00:00:58