[clang] [analyzer] Refactor MallocChecker to use `BindExpr` in `evalCall` (PR #106081)

[Donát Nagy via cfe-commits]

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@@ -58,14 +60,14 @@ void testFreeOpNew() {
   void *p = operator new(0);
   free(p);
   // mismatch-warning at -1{{Memory allocated by 'operator new' should be deallocated by 'delete', not 'free()'}}
-} // leak-warning{{Potential leak of memory pointed to by 'p'}}
+}
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NagyDonat wrote:

I feel that the disappearance of this "Potential leak" warning (and the one in the next TC) is a bit unfortunate, because it's not fair to say that a mismatched invalid deallocator call prevents the leak.

Could we keep this warning in a straightforward way that doesn't involve ugly hacks or lots of added code?

https://github.com/llvm/llvm-project/pull/106081