Fix retcode writing in run_pytorch_tests.py to ensure integer conversion

Author: subodh-dubey-amd

external-builds/pytorch/run_pytorch_tests.py

@@ -292,7 +292,7 @@ def force_exit_with_code(retcode):
     retcode_file = Path("run_pytorch_tests_exit_code.txt")
     print(f"Writing retcode {retcode} to '{retcode_file}'")
     with open(retcode_file, "w") as f:
-        f.write(str(retcode))
+        f.write(str(int(retcode)))
 
     print("Forcefully terminating to avoid https://github.com/ROCm/TheRock/issues/999")