[clang] Always emit complete debug info for types which appear as members of a standard-layout union. (PR #221615)

[Clayton Knittel via cfe-commits]

ClaytonKnittel wrote:

This is in response to https://github.com/llvm/llvm-project/pull/221566, which reverted a previous change to constructor homing logic due to handling of types in unions.

https://github.com/llvm/llvm-project/pull/221615