Semantic layer steps / job creator

[kristofferabs]

I like the structure of the semantic layer https://github.com/Mmodarre/acme_supermarkets_lhp_sample

Same as with pipelines this would benefit from the generator to combine the sdp flows with arbitrary semantic definitions.

1. This could be a generated job that runs sql tasks
2. if they are combined in a pipeline, they are added as a task in same job.
   Job steps would be
   "run sdp pipeline" 1->*
   "run sql tasks: create or replace gold view" 1->*
   "run sql tasks: create replace metric views"

This could be extended with other job tasks as well, but combining the semantic layer in the workflow is most valuable.

[Mmodarre]

Thanks @kristofferabs

I thought about it but just waiting for Metric view to come out of Preview and finalize before tackling it :-)