[Analyzer][VLASizeChecker] Check VLA size in typedef and sizeof.
The check of VLA size was done previously for variable declarations
(of VLA type) only. Now it is done for typedef (and type-alias)
and sizeof expressions with VLA too.
Reviewers: Szelethus, martong
Reviewed By: Szelethus, martong
Subscribers: rnkovacs, xazax.hun, baloghadamsoftware, szepet, a.sidorin, mikhail.ramalho, Szelethus, donat.nagy, dkrupp, gamesh411, Charusso, martong, ASDenysPetrov, cfe-commits
Differential Revision: https://reviews.llvm.org/D79072