[clang] [analyzer][NFC] Make RegionStore dumps deterministic (PR #115615)

[Balazs Benics via cfe-commits]

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@@ -232,27 +233,86 @@ class RegionBindingsRef : public llvm::ImmutableMapRef<const MemRegion *,
 
   void printJson(raw_ostream &Out, const char *NL = "\n",
                  unsigned int Space = 0, bool IsDot = false) const {
-    for (iterator I = begin(), E = end(); I != E; ++I) {
-      // TODO: We might need a .printJson for I.getKey() as well.
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steakhal wrote:

I dropped this TODO. It's not relevant. The key is always a base memory region, which obeys the json rules.

https://github.com/llvm/llvm-project/pull/115615