Apply several transformations at once

[streino]

Batching several transformations into a single job could be useful in general to save manual steps, and in particular when reapplying a given series of transformations going from "create" to "overwrite" mode.

For the case of "create" to "overwrite", we might be able to reuse the output of stored "create" jobs and simply reapply them in "overwrite". For the more general case, we'd need a way to multiselect transformations.

Do we need/want both? Any better approach?

[streino]

Confirmed during tests with DatARA. Especially when the same set of transformations needs to be applied to different filter conditions (eg metadata and template, or different sources).