Update gcr.io/kasten-images/datamover Docker tag to v7.0.6

This MR contains the following updates:

Package	Type	Update	Change
gcr.io/kasten-images/datamover		patch	7.0.5 -> 7.0.6
gcr.io/kasten-images/datamover	ironbank-docker	patch	7.0.5 -> 7.0.6
gcr.io/kasten-images/datamover	stage	patch	7.0.5 -> 7.0.6

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