Refactor cooling management across configuration and handlers

- Changed `DisableCooling` from a boolean to a pointer in various config types to allow explicit inheritance.
- Updated tests to reflect the new pointer usage for `DisableCooling`.
- Enhanced the `BuildConfigChangeDetails` function to handle optional boolean changes for `DisableCooling`.
- Added new tests to ensure proper handling of cooling overrides in configurations.
- Refactored the `SetQuotaCooldownDisabled` function and related logic to clarify the purpose of cooldown management.
- Introduced new tests for cooling override precedence in the auth manager.
- Ensured that all relevant handlers and synthesizers correctly manage the `DisableCooling` setting.