fix PYPI classifiers and upgrade cuda/python version in release build (#3051)

Summary:
Pull Request resolved: #3051

# context
* PYPI upload failed due to classifer standard updated: https://pypi.org/classifiers/
```
# previous:
Development Status :: 5 - Stable

# now:
Development Status :: 5 - Production/Stable
```
* add python version 3.13
* upgrade cuda version from 12.4 to 12.6,  to be consistent with fbgemm and nightly build

* sanity_check_on_gpu_and_push (linux.g5.12xlarge.nvidia.gpu, 3.13, cu126)
```
Uploading distributions to https://upload.pypi.org/legacy/
Uploading torchrec-1.2.0-py313-none-any.whl
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25h
View at:
https://pypi.org/project/torchrec/1.2.0/
```

Reviewed By: aliafzal

Differential Revision: D76136049

fbshipit-source-id: c337c5e0d47d13719262136b269e7d2e96e6564a

Author: TroyGarden

.github/scripts/validate_binaries.sh

@@ -130,7 +130,8 @@ conda create -y -n "${CONDA_ENV}" python="${MATRIX_PYTHON_VERSION}"
 
 conda run -n "${CONDA_ENV}" python --version
 
-if [[ ${MATRIX_GPU_ARCH_VERSION} != '12.4' ]]; then
+# we only have one cuda version for pypi build
+if [[ ${MATRIX_GPU_ARCH_VERSION} != '12.6' ]]; then
     exit 0
 fi