[APF Logging][Error Trait] To fill the errorTraits for ChildFailedError with signal abort (re-attempt of #165476) (#165688)

**Summary**
Land @guoding83128 's PR https://github.com/pytorch/pytorch/pull/165476 on his behalf due to EasyCLA blocking.
Refer his original PR for detail. But in short, elastic leaves 'errorTraits' as unknown when the error dump file is missing,
this PR adds a "system terminated error" to such case so the internal scuba table can correctly aggregate.

Pull Request resolved: https://github.com/pytorch/pytorch/pull/165688
Approved by: https://github.com/fduwjj

torch/distributed/elastic/multiprocessing/errors/__init__.py

@@ -79,9 +79,9 @@ __all__ = [
 logger = get_logger(__name__)
 
 
-JSON = dict
+JSON = dict[str, Any]
 
-_EMPTY_ERROR_DATA = {"message": "<NONE>"}
+_EMPTY_ERROR_DATA: dict[str, Any] = {"message": "<NONE>"}
 _NOT_AVAILABLE = "<N/A>"
 
 _R = TypeVar("_R")
@@ -143,6 +143,10 @@ class ProcessFailure:
                     f" received by PID {self.pid}"
                 )
             else:
+                self.error_file_data["errorTraits"] = {
+                    "category": "system_terminated_error",
+                    "retryability": "False",
+                }
                 self.message = "To enable traceback see: https://pytorch.org/docs/stable/elastic/errors.html"
 
     def _get_error_data(self, error_file_data: dict[str, Any]) -> tuple[str, int]: