fix: csi-s3-provisioner cannot rebuild when node outage

[ooninoo]

Change provisioner controller type from StatefulSet to Deployment，and then open leader-election。

The advantage of doing this is ，when host of provisioner was crash， provisioner can restart on other node.

[jwetzell]

Probably should actually have replicas > 1 so that the provisioner is actually HA, would also be good to expose configuring that via Helm values.

[ooninoo]

Probably should actually have replicas > 1 so that the provisioner is actually HA, would also be good to expose configuring that via Helm values.

Yes, I changed to 3