[clang] [Clang][Sema] fix outline member function template with default align crash (PR #78400)

[Erich Keane via cfe-commits]

erichkeane wrote:

> > @jcsxky this patch introduced a regression. Please see the reproducer here: https://godbolt.org/z/rEfWP75Ta. It compiles before this change and fails at this change. It also compiles with gcc and clang-17.
> 
> Sorry for importing new bugs. @erichkeane Could you help me revert this patch in order to not influence others since I am not familiar with github reverting operation? I afraid I would spent a long time to look into the root cause of the issue. Appreciate for you help and many thanks!

No worries, happens all the time :)  Reverting because you requested it, feel free to submit a new version of this review that fixes that as well!  Revert will be commited from here: https://github.com/llvm/llvm-project/pull/80144

https://github.com/llvm/llvm-project/pull/78400