[clang] [Clang] Rebind the closure temporary when rebuilding default member initializers (PR #196597)

[Erich Keane via cfe-commits]

https://github.com/erichkeane commented:

This fix as-is seems perfectly reasonable to me... @efriedma-quic could you take another look?  This has changed massively.

https://github.com/llvm/llvm-project/pull/196597