Csi S3 Versions Save

• Allow mounting existing prefixes @defrox https://github.com/ctrox/csi-s3/pull/60
• Upgrades goofys to v0.24.0
• Drops k8s.io/kubernetes dependency

• An existing bucket can now be set in the StorageClass. See README.md for more details
• Kubernetes v1.20 support
• Updated s3fs to 1.84 (based on debian buster)

Removes old unused secret variable encryptionKey.

Breaking Changes:

• Credentials are now supplied using volume secrets instead of via ENV
• Upgrades csi-spec to v1.1.0
• Removed s3ql mounter

Fixed an issue where s3backer could not mount due to a missing loop device.

Initial alpha release. While most of the driver is tested this has not had any production use. Use it at your own risk and not for important data.