In-Context: N of respondents per problem doesn't match on prob engagement and final response results charts

[crathbun428]

Steps to Reproduce

1. Login to Studio as staff, an instructor or admin
2. Navigate to the Course Outline page for a course and click on the analytics button
3. Note the the total number of respondents for a problem in the course as shown in the Problem Engagement chart
4. Scroll down to the Graded Subsection Analytics section of the Analytics sidebar
5. Click on the name of the Graded Subsection that contains that problem and view the Final Response Results chart for that problem

Expected Behavior

1. The number of respondents for the problem match in both charts

Actual Behavior

1. The number of respondents for the problem does not match in both charts. See below where the same problem has 15 respondents in one chart and 20 in another:

[saraburns1]

The problem here is in dim_problem_results in aspects-dbt (which populates the top chart Problem Results). The actor_id is only populated when answered correctly and then we select distinct which combines all of those incorrect responses into 1. I will put in a fix for this