no more "require_or_load" in zeitwerk
no more "require_or_load" in zeitwerk

refs FOO-2439
flag=none

https://github.com/fxn/zeitwerk/issues/56#issuecomment-504117957

TEST PLAN:
  1) specs pass

Change-Id: I47767c7691a25ef298820072e7e4fe6b39fb89f8
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/277229
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
QA-Review: Ethan Vizitei <73eeb0b2f65d05a906adf3b21ee1f9f5a2aa3c1c@instructure.com>
Product-Review: Ethan Vizitei <73eeb0b2f65d05a906adf3b21ee1f9f5a2aa3c1c@instructure.com>
Reviewed-by: Jacob Burroughs <8ecea6e385af5cf9f53123f5ca17fb5fd6a6d4b2@instructure.com>

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