[llvm] [llvm-profgen] Filter out ambiguous cold profiles during profile generation (PR #81803)

[via llvm-commits]

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@@ -1024,6 +1058,7 @@ void CSProfileGenerator::postProcessProfiles() {
     CSConverter.convertCSProfiles();
     FunctionSamples::ProfileIsCS = false;
   }
+  filterAmbiguousProfile(ProfileMap);
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WenleiHe wrote:

why do we have it both here and in `postProcessProfiles `

https://github.com/llvm/llvm-project/pull/81803