chore(project): bump django-storages to 1.14.4 (#11560)

Becuase

* We are migrating to the new GCPV2 infrastructure
* It uses 'GKE Workloads' to manage permissions
* Displaying screenshots in the UI requires generating 'signed urls'
* The old versions of django-storages and google-cloud-storages don't
support signing urls in GKE Workloads

This commit

* Bumps to the latest django-storages and google-cloud-storages
* Hopefully this allows us to generate signed urls with GKE Workloads

fixes #11559