[clang] [analyzer] Add aggregate value tracking to the LifetimeModeling checker (PR #214823)

[Benedek Kaibas via cfe-commits]

benedekaibas wrote:

[62d4f3c](https://github.com/llvm/llvm-project/pull/214823/commits/62d4f3ce17203c28ffff3357483a9b2883325ffb) addresses review comments from @steakhal in https://github.com/llvm/llvm-project/pull/214589. 

#214589 needed to be converted to stacked PRs since #214824 and #214825 depend on it and there will be future PRs also depening on #214589

https://github.com/llvm/llvm-project/pull/214823