Add new preset, enable, and update hook #5387

#5387 

**Please resolve #5469 before merging this PR**. This PR requires [_os_update_strongarm()](https://github.com/openscholar/openscholar/commit/24a2e2606af13b7d221970a9990c4ea8feba0515) added in PR #5469 

#### Changes

* Add new preset export in module vsite_preset with desired characteristics
* Update "enabled presets" variable to include the new preset
* Add update hook to update both the presets export and the variable export.