[clang] [CIR] Add binary operators (PR #132420)

[Andy Kaylor via cfe-commits]

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@@ -127,6 +136,8 @@ struct MissingFeatures {
   static bool ternaryOp() { return false; }
   static bool tryOp() { return false; }
   static bool zextOp() { return false; }
+  static bool opPtrStride() { return false; }
+  static bool opPtrDiff() { return false; }
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andykaylor wrote:

```suggestion
  static bool ptrDiffOp() { return false; }
```

https://github.com/llvm/llvm-project/pull/132420