feat: use dbt models for problem datasets

[SoryRawyer]

Converts fact_problem_responses and fact_learner_problem_summary from virtual to physical datasets, relying on models created by dbt. Relies on changes in the corresponding aspects-dbt PR. If and when those changes get approved I will mark this PR as ready to review.

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[bmtcril]

Makes sense to me, v1.3 of aspects-dbt is released with the prerequisite changes.

[SoryRawyer]

Gah, sorry, this is blocked by a bug in the dbt project. I'll put this back into draft status until I can open a new PR to the dbt project.

[bmtcril]

👍

Just a heads up, there are big changes to multi-response problems coming down in the somewhat near term. Shouldn't impact this PR right now. They're going to be something of a pain to model, but it seems like the only way to correctly capture those problems: openedx/event-routing-backends#325

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