[clang] [clang] Trim large(-ish) includes from common headers (PR #216946)

[Chandler Carruth via cfe-commits]

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@@ -15,6 +15,7 @@
 
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Basic/TargetOptions.h"
+#include "llvm/IR/DerivedTypes.h"
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chandlerc wrote:

Also for the bit width constant.

https://github.com/llvm/llvm-project/pull/216946