Move todo query to the slave
Move todo query to the slave

fixes:KNO-378
flag=none

Test plan
- Set up a slave user in Canvas
  https://bit.ly/39GNe1q
- Ensure you can access the todo
  list as a teacher on both the
  main dashboard as well as
  the one in a course

Change-Id: Ida66c2a4a29602a492ec249b180371d88438fa4b
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/232560
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Rob Orton <7e09c9d3e96378bf549fc283fd6e1e5b7014cc33@instructure.com>
QA-Review: Rob Orton <7e09c9d3e96378bf549fc283fd6e1e5b7014cc33@instructure.com>
Product-Review: Rob Orton <7e09c9d3e96378bf549fc283fd6e1e5b7014cc33@instructure.com>

sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,sfu/canvas-lms