* use rclone 1.54.1
* if removeBucket or removePrefix failed, fsmeta is not deleted
* fix removeObjects error check
* add removeObjectsOneByOne as a fallback when removeObjects fails
* fix repeat in yaml

* rclone use 1.54.1
* add EnsureFSMetaExist func
* fix removeObjects have err check
* add removeObjectsOneByOne, when removeObjects failed, will try to use it
* fix repeat in yaml

Add github action for build and test

use csi-provisioner:v2.1.0, provider and attacher will only run in master node

With this, each volume will get its own prefix within the bucket if it
is configured in the storage class. This also ensures backwards
compatibility with older volumes that have been created in earlier
versions of csi-s3.

* Use go 1.16
* Use debian buster for dependencies