empty caching allocator before test_avg_pool2d large subtest (#63528)
Summary:
Otherwise, unrecoverable OOM occurs on MI25. Fixes broken ROCm CI test1.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63528
Reviewed By: malfet, zhouzhuojie
Differential Revision: D30459151
Pulled By: walterddr
fbshipit-source-id: 63e205c4f486fcbdd514cfb0ed8e38584f894585
