[TPU] patch TPU wheel build script to resolve metadata issue (#27279)

Signed-off-by: Johnny Yang <johnnyyang@google.com>

setup.py

@@ -545,7 +545,9 @@ def get_vllm_version() -> str:
     # Allow overriding the version. This is useful to build platform-specific
     # wheels (e.g. CPU, TPU) without modifying the source.
     if env_version := os.getenv("VLLM_VERSION_OVERRIDE"):
-        return env_version
+        print(f"Overriding VLLM version with {env_version} from VLLM_VERSION_OVERRIDE")
+        os.environ["SETUPTOOLS_SCM_PRETEND_VERSION"] = env_version
+        return get_version(write_to="vllm/_version.py")
 
     version = get_version(write_to="vllm/_version.py")
     sep = "+" if "+" not in version else "."  # dev versions might contain +