Fix rocJPEG dlopen failure in ROCm 7.14 wheels by adding RPATH to rocm-sdk-core

[akashveramd]

Issue: image_stable.so is compiled with -lrocjpeg on ROCm 7.14, but librocjpeg.so.1 lives in the separate rocm-sdk-core Python wheel (site-packages/_rocm_sdk_core/lib/) which the dynamic linker doesn't know about — causing dlopen() to fail silently and all torchvision.io image ops to disappear.
This error was seen in: https://github.com/pytorch/test-infra/actions/runs/31064437484/job/92503112712?pr=8451#step:18:369

Fix: extend the RPATH embedded in image_stable.so to include $ORIGIN/../_rocm_sdk_core/lib (and sibling rocm-sdk wheel dirs) so the dynamic linker finds librocjpeg.so.1 at runtime.

This PR also reverts the temporary workaround from PR #9586 that disabled rocJPEG entirely.

cc @jeffdaily @jithunnair-amd

[pytorch-bot]

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[NicolasHug]

Thanks @akashveramd but as mentioned in #9587 , I'm going to remove the ROCJPEG decoder from torchvision as I'm migrating it to TorchCodec. Any chance you can help with meta-pytorch/torchcodec#1554 instead? I'd like help over there to see how we can unblock the test failures, which seem to be related to missing dependencies (might be similar to this one).