[clang] [C++20] [Modules] Introduce -fexperimental-modules-reduced-bmi (PR #85050)

[Matheus Izvekov via cfe-commits]

================
@@ -1061,6 +1070,16 @@ CodeGenAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
     CI.getPreprocessor().addPPCallbacks(std::move(Callbacks));
   }
 
+  if (CI.getFrontendOpts().GenReducedBMI &&
+      !CI.getFrontendOpts().ModuleOutputPath.empty()) {
+    std::vector<std::unique_ptr<ASTConsumer>> Consumers{2};
----------------
mizvekov wrote:

Minor nit: https://llvm.org/docs/CodingStandards.html#id28
```suggestion
    std::vector<std::unique_ptr<ASTConsumer>> Consumers(2);
```

https://github.com/llvm/llvm-project/pull/85050