Credentials: Convert confidentiality agreement config var to bool before comparison

[jpmartinspt]

Done

Credentials: Convert confidentiality agreement config var to bool before comparison.

QA

• Check out this feature branch
• Run the site using the command ./run serve or dotrun
• View the site locally in your web browser at: http://0.0.0.0:8001/credentials/exam?id=1
• The page should render
• Set env var to true
• Restart the site using the command ./run serve or dotrun
• The agreement page should show.

[webteam-app]

Demo starting at https://ubuntu-com-13602.demos.haus

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a9058fa) 74.41% compared to head (c4173f1) 74.41%.
Report is 29 commits behind head on main.

Additional details and impacted files

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##             main   #13602   +/-   ##
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  Coverage   74.41%   74.41%           
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  Files         107      107           
  Lines        2838     2838           
  Branches      946      946           
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  Hits         2112     2112           
  Misses        702      702           
  Partials       24       24