[Analyzer] Add checkRegionChanges for SmartPtrModeling

    Summary:
    Implemented checkRegionChanges for SmartPtrModeling

    Reviewers: NoQ, Szelethus, vsavchenko, xazax.hun

    Reviewed By: NoQ, vsavchenko, xazax.hun

    Subscribers: martong, cfe-commits
    Tags: #clang

    Differential Revision: https://reviews.llvm.org/D83836