bugfix: S3C-3744 fix bucket encryption related actions
bugfix: S3C-3744 fix bucket encryption related actions

Changes made to match the AWS reference:
https://docs.aws.amazon.com/service-authorization/latest/reference/list_amazons3.html

- change "bucketDeleteEncryption" action to "s3:PutEncryptionConfiguration"

- rename PUT and GET actions to PutEncryptionConfiguration and
  GetEncryptionConfiguration and add missing 's3:' prefix

scality/Arsenal,scality/Arsenal