[fr] Added protection against missing stack frames in fr cont. (pytorch#150133)

Summary: Previously we had D70358287, which didn't fully resolved the issue.

Test Plan:
# FR
`buck2 run @//mode/opt //caffe2/fb/flight_recorder:fr_trace -- --mast_job_id f710320638-TrainingApplication --mast_job_version 0 --mast_job_attempt 0 --bucket tlcm_log_blob --world_size 128 --dump_file_name_offset 0 --allow-incomplete-ranks`
Confirm no error
# FR analyzer
`buck2 run @//mode/opt //investigations/dr_patternson/analyzers/ai_observability:ai_observability-all-analyzers-cli -- flight_recorder_analyzer --mast_job_name f710320638-TrainingApplication --mast_job_version 0 --mast_job_attempt 0`
Confirm no error

Differential Revision: D71998980

Pull Request resolved: pytorch#150133
Approved by: https://github.com/fduwjj

Author: VieEeEw

tools/flight_recorder/components/types.py

@@ -224,7 +224,7 @@ def __init__(self, entry: dict[str, Any], expected_ranks: set[int]) -> None:
         self.input_sizes = entry["input_sizes"]
         self.output_sizes = entry["output_sizes"]
         self.collective_state = entry["state"]
-        self.collective_frames = entry["frames"]
+        self.collective_frames = entry.get("frames", [])
         self.expected_ranks = expected_ranks
         self.missing_ranks: set[int]
         self.input_numel: int
@@ -316,7 +316,7 @@ def to_collective(
                     output_sizes=entry["output_sizes"],
                     expected_ranks=self.expected_ranks,
                     collective_state=entry["state"],
-                    collective_frames=entry["frames"],
+                    collective_frames=entry.get("frames", []),
                     type_of_mismatch=error,
                 )
             return Collective(