Finish adding Python 3.14 to the published CUDA wheel set (pytorch#22038)

Author: shoumikhin

.ci/scripts/tests/test_filter_cuda_matrix.py

@@ -251,7 +251,7 @@ def test_published_cuda_versions(self):
 
     def test_published_python_versions(self):
         self.assertEqual(
-            FILTER.SUPPORTED_PYTHON_VERSIONS, ["3.10", "3.11", "3.12", "3.13"]
+            FILTER.SUPPORTED_PYTHON_VERSIONS, ["3.10", "3.11", "3.12", "3.13", "3.14"]
         )
 
     def test_the_workflows_offer_exactly_the_published_pythons(self):

docs/source/using-executorch-cpp.md

@@ -307,8 +307,7 @@ pip install executorch torch \
   --extra-index-url https://pypi.org/simple
 ```
 
-CUDA wheels are built for Python 3.10 through 3.13. On a newer Python there is no CUDA wheel to
-install, so pip falls back to the CPU one.
+CUDA wheels are built for Python 3.10 through 3.14, which is every Python this project supports.
 
 The second index is required: a bare `--index-url` replaces PyPI rather than adding to it, and some
 dependencies are only on PyPI. The torch you install has to come from the same CUDA index, because