refactor: use extended block names in instructor dashboard (FC-0033)

[SoryRawyer]

This change updates Superset assets to use the new dbt models that include block display names with location information. This includes the video and problem filters as well as the values returned by course-level charts. The screenshots below show an example of the new format.

Using new display names in charts:

Using new display names in filters:

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[Ian2012]

@bmtcril is this the desired behavior?

I tough it would a larger problem/video selector field, not an index

[bmtcril]

🎉

[bmtcril]

@Ian2012 this is what we came to as a solution in the demo, the instructor was confused by the ordering of blocks and wanted them in the order that they appear in the course. Similarly they didn't always know the names of blocks (or had the same name for numerous blocks) and wanted to be able to identify it in the course. So I think this solves for both of those things. I'd like to get it into the beta and gather more feedback there.

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