Enable Pyrefly in fbcode/vision/fair

Summary:
Automated migration to enable Pyrefly type checking for `fbcode/vision/fair`.

- Added `python.set_pyrefly(True)` to PACKAGE file
- Suppressed pre-existing type errors

Pyrefly is Meta's next-generation Python type checker, replacing Pyre.

If you encounter issues, you can revert the PACKAGE change by removing
the `python.set_pyrefly(True)` line.
#pyreupgrade

Differential Revision: D107142434

fbshipit-source-id: 25929bb3d5a310d00dab11a46c5395df94357feb

projects/implicitron_trainer/impl/training_loop.py

@@ -199,6 +199,7 @@ class ImplicitronTrainingLoop(TrainingLoopBase):
                     and self.test_interval > 0
                     and epoch % self.test_interval == 0
                 ):
+                    # pyrefly: ignore [missing-attribute]
                     self.evaluator.run(
                         device=device,
                         dataloader=test_loader,
@@ -215,6 +216,7 @@ class ImplicitronTrainingLoop(TrainingLoopBase):
 
         if self.test_when_finished:
             if test_loader is not None:
+                # pyrefly: ignore [missing-attribute]
                 self.evaluator.run(
                     device=device,
                     dump_to_json=True,