[libcxx] [llvm] [llvm][CI] Add metrics collection for libc++ premerge testing. (PR #152801)

[via llvm-commits]

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@@ -81,6 +90,139 @@ class GaugeMetric:
     time_ns: int
 
 
+ at dataclass
+class AggregateMetric:
+    aggregate_name: str
+    aggregate_queue_time: int
+    aggregate_run_time: int
+    aggregate_status: int
+    workflow_id: int
+
+
+def create_and_append_libcxx_aggregates(
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cmtice wrote:

Done.

https://github.com/llvm/llvm-project/pull/152801