docs: revert changes to OpenAPI spec

[apify-service-account]

• Updates the auto-generated Pydantic models and TypedDicts based on the proposed OpenAPI specification changes.
• Based on apify-docs PR #2713.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.54%. Comparing base (b10d823) to head (5ba79ba).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #914   +/-   ##
=======================================
  Coverage   94.54%   94.54%           
=======================================
  Files          48       48           
  Lines        5098     5098           
=======================================
  Hits         4820     4820           
  Misses        278      278           

Flag	Coverage Δ
integration	92.99% <ø> (+0.05%)	⬆️
unit	83.36% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.