[clang] [CIR] Initial implementation of lowering CIR to MLIR (PR #127835)

[Erich Keane via cfe-commits]

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@@ -55,6 +55,7 @@ class CIRGenerator : public clang::ASTConsumer {
   void Initialize(clang::ASTContext &astContext) override;
   bool HandleTopLevelDecl(clang::DeclGroupRef group) override;
   mlir::ModuleOp getModule() const;
+  mlir::MLIRContext &getContext() { return *mlirContext; }
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erichkeane wrote:

```suggestion
  mlir::MLIRContext &getMLIRContext() { return *mlirContext; }
```

MINOR preference?  We have all sorts of `contexts` all over the place that these are incredibly confusing.

https://github.com/llvm/llvm-project/pull/127835