Persist exercise submissions when user submits exercise submission

[bryanjenningz]

Changes:

• When you submit an exercise submission on the DOJO exercises page (/exercises/js0), it will send a GraphQL mutation and persist even if you refresh the page.

How to test:

• Create a DOJO module at /admin/lessons/js0/modules
• Create DOJO exercises at /curriculum/js0/mentor
• Go to /exercises/js0
• Notice how the newly-created exercises are marked as "NOT ANSWERED"
• Click "SOLVE EXERCISES" and answer an exercise and submit it
• Click the back arrow to show the exercise list again
• Notice that when you look at the exercise you answered, it is now marked as "ANSWERED"
• If you refresh the page then the exercises you answered are still marked as "ANSWERED"

This pull request is related to #2253

[vercel]

@bryanjenningz is attempting to deploy a commit to the c0d3-prod Team on Vercel.

A member of the Team first needs to authorize it.

[codecov]

Codecov Report

Merging #2381 (3040ac1) into master (fa2154f) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master     #2381   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          184       184           
  Lines         3236      3239    +3     
  Branches       856       856           
=========================================
+ Hits          3236      3239    +3     

Impacted Files	Coverage Δ
pages/exercises/[lessonSlug].tsx	100.00% <100.00%> (ø)

[vercel]

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Name	Status	Preview	Updated
c0d3-app	✅ Ready (Inspect)	Visit Preview	Oct 1, 2022 at 1:55PM (UTC)