Add integration test for Git LFS

[kylos101]

Is your feature request related to a problem? Please describe

Git LFS was failing during content-init until we added support for it in #8119.

Describe the behaviour you'd like

Support for Git LFS should be covered in a proper integration test as part of our content tests.

Additional context

https://github.com/atduarte/lfs-test/tree/init