Other S3-Compatible Storage in Snapshots Settings does not work

[sgalsaleh]

In the Snapshots Settings page, when selecting the Other S3-Compatible Storage option and providing all of: Bucket, Access Key ID, Access Key Secret, Endpoint and a Region and clicking Update settings, the page shows “Settings updated”, but the screen then switches to the Amazon S3 option and creating snapshots fails.

I think i've identified two issues that are related to this:

1- The credentials secret for Other S3-Compatible Storage is not created/updated https://github.com/replicatedhq/kots/blob/5407de9e/kotsadm/pkg/snapshot/store.go#L153

2- The provider for Other S3-Compatible Storage is passed as other from Kotsadm and is saved as is: https://github.com/replicatedhq/kots/blob/fa9f1049/kotsadm/pkg/handlers/snapshots.go#L104
But then, when reading the store information for it, the code checks for aws https://github.com/replicatedhq/kots/blob/5407de9e/kotsadm/pkg/snapshot/store.go#L378
which i think is the cause for switching to the Amazon S3 option after the settings are updated.