[llvm] [BOLT] Add NamedRegionTimer to inferStaleProfile (PR #92621)

[Amir Ayupov via llvm-commits]

================
@@ -705,6 +706,10 @@ void assignProfile(BinaryFunction &BF,
 
 bool YAMLProfileReader::inferStaleProfile(
     BinaryFunction &BF, const yaml::bolt::BinaryFunctionProfile &YamlBF) {
+
+  NamedRegionTimer T("inferStaleProfile", "inferring from stale profile",
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aaupov wrote:

```suggestion
  NamedRegionTimer T("inferStaleProfile", "stale profile inference",
```

https://github.com/llvm/llvm-project/pull/92621