fix: course seeder not run in production (resolves #2013)

[jobara]

Resolves #2013

• Moves model related seeders to be called by the DatabaseSeeder
• Removes the ProductionSeeder as it no longer has any extra functionality over the DatabaseSeeder

Prerequisites

If this PR changes PHP code or dependencies:

• I've run composer format and fixed any code formatting issues.
• I've run composer analyze and addressed any static analysis issues.
• I've run php artisan test and ensured that all tests pass.
• I've run composer localize to update localization source files and committed any changes.

If this PR changes CSS or JavaScript code or dependencies:

• I've run npm run lint and fixed any linting issues.
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BEGIN_COMMIT_OVERRIDE
fix: course seeder not run in production (resolves #2013) #2025
END_COMMIT_OVERRIDE

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e4ffdc3) 97.65% compared to head (4218ce8) 97.65%.

Additional details and impacted files

@@            Coverage Diff            @@
##                dev    #2025   +/-   ##
=========================================
  Coverage     97.65%   97.65%           
  Complexity     2055     2055           
=========================================
  Files           314      314           
  Lines          8991     8991           
=========================================
  Hits           8780     8780           
  Misses          211      211           

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