Add python 3.13 support to CMakeLists.txt

This matches the work done in 8878692
Python 3.8 was subsequently dropped as well here.

CMakeLists.txt

@@ -19,7 +19,7 @@ include(${CMAKE_CURRENT_LIST_DIR}/cmake/utils.cmake)
 set(ignoreMe "${VLLM_PYTHON_PATH}")
 
 # Supported python versions. These should be kept in sync with setup.py.
-set(PYTHON_SUPPORTED_VERSIONS "3.8" "3.9" "3.10" "3.11" "3.12")
+set(PYTHON_SUPPORTED_VERSIONS "3.9" "3.10" "3.11" "3.12" "3.13")
 
 # Supported NVIDIA architectures.
 set(CUDA_SUPPORTED_ARCHS "8.0;8.6;8.9;9.0")
@@ -241,4 +241,4 @@ if (FA3_ENABLED AND ${CMAKE_CUDA_COMPILER_VERSION} GREATER_EQUAL 12.0)
     )
 elseif(${CMAKE_CUDA_COMPILER_VERSION} VERSION_LESS 12.0)
     message(STATUS "FA3 is disabled because CUDA version is not 12.0 or later.")
-endif ()
+endif ()