chore: Remove GQL playground access from prod

[calvin-codecov]

Purpose/Motivation

What is the feature? Why is this being done?

Closes https://github.com/codecov/internal-issues/issues/916

Turning the setting off for SettingsModule.PRODUCTION.value and SettingsModule.ENTERPRISE.value

Tested locally by setting the line to get_settings_module() != SettingsModule.DEV.value and tried accessing at http://localhost:8000/graphql/ and the page was inaccessible.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.23%. Comparing base (d984fa8) to head (d9fb01b).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #936   +/-   ##
=======================================
  Coverage   96.23%   96.23%           
=======================================
  Files         823      823           
  Lines       18972    18972           
=======================================
  Hits        18257    18257           
  Misses        715      715           

Flag	Coverage Δ
unit	92.47% <100.00%> (ø)
unit-latest-uploader	92.47% <100.00%> (ø)

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[codecov-notifications]

Codecov Report

All modified and coverable lines are covered by tests ✅

✅ All tests successful. No failed tests found.

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