[clang] [llvm] [clang][MBD] set up module build daemon infrastructure (PR #67562)

[Connor Sughrue via cfe-commits]

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@@ -264,6 +264,26 @@ def err_test_module_file_extension_version : Error<
   "test module file extension '%0' has different version (%1.%2) than expected "
   "(%3.%4)">;
 
+// Module Build Daemon
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cpsughrue wrote:

I don't think that's a bad idea. There are currently only 6 options in the `ModuleBuildDaemon` group so for now I'd vote to keep them a part of `DiagnositcFrontendKinds.td` but in subsequent PRs if the number increases, I can pull them out to there own `.td` file

https://github.com/llvm/llvm-project/pull/67562