[clang] [clang] Fix size and alignment of packed sub-byte integer vectors (PR #161796)

[Steffen Larsen via cfe-commits]

steffenlarsen wrote:

> > > Do we need similar checks anywhere else we check isPackedVectorBoolType?
> > 
> > 
> > Luckily that case was already handled [here](https://github.com/llvm/llvm-project/pull/161796/files#diff-328fcdcf882c121d5c56fdc6cd56c43fdbbb00da171da70f3ba6982c43686a63L2097-L2098) and now [here](https://github.com/llvm/llvm-project/pull/161796/files#diff-328fcdcf882c121d5c56fdc6cd56c43fdbbb00da171da70f3ba6982c43686a63R2098-R2099). 😄
> 
> Sorry, I meant, code that isn't currently touched by your patch. ExprConstant, CGDebugInfo, etc. Not that you need to fix everything in one patch, but I'd like some idea of the scope of the full set of patches.

Ah, my bad! Turns out my Monday morning reading comprehension is on part with a 3rd grader's. I will have a look through the places that have `isPackedVectorBoolType` and see if we more handling.

https://github.com/llvm/llvm-project/pull/161796