[llvm] [SampleFDO][TypeProf]Support vtable type profiling for ext-binary and text format (PR #148002)

[Paschalis Mpeis via llvm-commits]

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@@ -989,6 +1018,42 @@ class FunctionSamples {
     return CallsiteSamples;
   }
 
+  /// Returns vtable access samples for the C++ types collcted in this function.
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paschalis-mpeis wrote:

typo:
```suggestion
  /// Returns vtable access samples for the C++ types collected in this function.
```

https://github.com/llvm/llvm-project/pull/148002