Draft: Recognize uploads through fog gem to be file storage

What does this MR do?

While uploading Terraform State files, we use carrierwave and fog gems.

When checking if the file's checksum can be calculated, we check what the file storage object is. For Terraform uploads through Terraform::StateUploader we expect the storage to specifically be of the type CarrierWave::Storage::File, but when external object storage is used, the storage is actually of type Carrierwave::Storage::Fog. Both these classes inherit from CarrierWave::Storage::Abstract.

This discrepancy breaks checksum calculation for Geo.

One solution is to check explicitly for both these classes.

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

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