[clang] [CIR] Fix element type and alignment handling in emitDestroy for arrays (PR #155333)

[Andy Kaylor via cfe-commits]

https://github.com/andykaylor commented:

Doesn't this have an effect on any of the existing tests?

I'm not sure this is what we want. I know the parameter for emitArrayDestroy is named `elementType` but the current output looks correct.

https://github.com/llvm/llvm-project/pull/155333