Replace assertTrue(torch.allclose(...)) with assertClose in test_transforms.py

Summary:
## LLM-generated Summary:
Replaces self.assertTrue(torch.allclose(...)) with self.assertClose(...) throughout fbcode/vision/fair/pytorch3d/tests/test_transforms.py. This standardizes numeric closeness assertions for clearer failures and consistency while preserving tolerances and test behavior.
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Session: DEV34970678

Reviewed By: shapovalov

Differential Revision: D90251428

fbshipit-source-id: cdae842be82f0ba548802e6977be272134e8508c

Author: bottler