[clang] [C++20][Modules] Fix crash when function and lambda inside loaded from different modules (PR #109167)

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eaeltsin wrote:

A comment on another non-determinism issue that might be related - https://github.com/llvm/llvm-project/issues/106855#issuecomment-2322927480


https://github.com/llvm/llvm-project/pull/109167