[clang] [analyzer] Generalize field initializer resolution in RegionStore (PR #189361)

[Balázs Benics via cfe-commits]

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@@ -585,6 +585,8 @@ class RegionStoreManager : public StoreManager {
   std::optional<SVal>
   getConstantValFromConstArrayInitializer(RegionBindingsConstRef B,
                                           const ElementRegion *R);
+  std::optional<SVal> getConstantValFromInitializer(const FieldRegion *R,
+                                                    bool isMainAnalysis);
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steakhal wrote:

```suggestion
                                                    bool IsMainAnalysis);
```

https://github.com/llvm/llvm-project/pull/189361