Log state in touch_context
Log state in touch_context

Log some of the variables in touch_context when announcements are
saved to better understand what is happening in LS-3147 in a production
environment.

refs LS-3147
flag = none

Test plan:
 - Create a new announcement
 - Look in rails logs and expect to see a few lines like:
   [CANVAS_ERRORS] EXCEPTION LOG
   touch_context: @@skip_touch_context=false; @skip_touch_contex...

Change-Id: I573ba0501c71af8f3016b8085e98bee94c9479ea
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/291792
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Reviewed-by: Robin Kuss <0b206b54367b2de0334896ea45826f0e3194bd35@instructure.com>
QA-Review: Robin Kuss <0b206b54367b2de0334896ea45826f0e3194bd35@instructure.com>
Product-Review: Jackson Howe <318c10a818c1b1f2ec50cdcb1827b2c6c5ebd7dc@instructure.com>

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