ARR: Store Homepage Configuration

[haroldrubio]

The ARR homepage information is just being copied between cycles but it should be stored in openreview-py.

The following changes also need to be made:

It should change to be for reviewers:

Please read the [reviewer guidelines](https://aclrollingreview.org/reviewerguidelines).

And for ACs:

Please read the [AC guidelines](https://aclrollingreview.org/acguidelines). Refer to [reviewer guidelines](https://aclrollingreview.org/reviewerguidelines) as needed.