[clang] [NFC] Refactor ConstantArrayType size storage (PR #85716)

[Cooper Partin via cfe-commits]

https://github.com/coopp approved this pull request.

Looks good to me for what I can see in the code.

I took special care to make sure places where noticed the old size accessor (CAT->getSize().getZExtValue() ) being called, was now using (CAT->getZExtSize()).


https://github.com/llvm/llvm-project/pull/85716