feat: Allow short circuit of beforeFind

[EmpiDev]

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Pull Request

• Report security issues confidentially.
• Any contribution is under this license.
• Link this pull request to an issue.

Issue

Closes: https://github.com/parse-community/parse-server/issues/8693

Approach

This PR continues and supersedes #8694 by @dblythy. Adds ability to return objects (or an empty array) from a beforeFind trigger.

Tasks

• [x] Add tests

Summary by CodeRabbit

• New Features
  • Improved support for returning objects or arrays of objects directly from cloud triggers, allowing for more flexible query responses.
• Bug Fixes
  • Ensured that objects returned from triggers are handled correctly without unnecessary conversions.
• Tests
  • Added comprehensive tests to verify the behavior of triggers returning objects or arrays, including unsaved objects and empty results.
• Refactor
  • Centralized trigger handling for find and get operations to ensure consistent execution and security enforcement.
  • Enhanced trigger processing with improved parameter handling, JSON serialization, and query construction for better robustness and clarity.