[clang] [clang][modules] Reset codegen options. (PR #74006)

[Jan Svoboda via cfe-commits]

================
@@ -515,6 +430,8 @@ ENUM_CODEGENOPT(ZeroCallUsedRegs, llvm::ZeroCallUsedRegs::ZeroCallUsedRegsKind,
 /// non-deleting destructors. (No effect on Microsoft ABI.)
 CODEGENOPT(CtorDtorReturnThis, 1, 0)
 
+#include "DebugOptions.def"
----------------
jansvoboda11 wrote:

Do you think it would make sense to eventually treat these as separate top-level `.def` files?

https://github.com/llvm/llvm-project/pull/74006