CopyVolumeData followed by RestoreData does not restore to the original location

[laurentiusoica]

For a single node PostgreSQL deployment with the Bitnami charts:

helm install postgresql --namespace postgresql bitnami/postgresql -f values.yaml --create-namespace

with this backup phase:

    - func: CopyVolumeData
      name: CopyPostgreSQLVolumeDataToObjectStore
      args:
        namespace: "{{ .StatefulSet.Namespace }}"
        volume: "data-postgresql-0"
        dataArtifactPrefix: indigo/postgresql/{{ toDate "2006-01-02T15:04:05.999999999Z07:00" .Time | date "20060102150405" }}

and this restore phase:

    - func: RestoreData
      name: Restore Data From Object Store
      args:
        namespace: "{{ .StatefulSet.Namespace }}"
        image: ghcr.io/kanisterio/kanister-tools:0.98.0
        backupArtifactPrefix: "{{ .ArtifactsIn.backup.KeyValue.backupArtifactLocation }}"
        backupTag: "{{ .ArtifactsIn.backup.KeyValue.backupTag }}"
        volumes:
          data-postgresql-0: /bitnami/postgresql
        restorePath: /bitnami/postgresql

The data is restored under /mnt/vol_data/data-postgresql-0/ instead of the root of the volume.

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