[clang] [serialization] no transitive decl change (PR #92083)

[Mitch Phillips via cfe-commits]

hctim wrote:

Hi from the sanitizer buildbot mainter, thanks for the fast revert! For full reproduction, you can use https://github.com/google/sanitizers/wiki/SanitizerBotReproduceBuild and `buildbot_fast.sh`. But, you can reproduce it quicker by using `-DCMAKE_C_FLAGS="-fsanitize=undefined"  -DCMAKE_CXX_FLAGS="-fsanitize=undefined" -DLLVM_USE_SANITIZER=Undefined` in your cmake (then `{ninja,make} check-clang`).


https://github.com/llvm/llvm-project/pull/92083