[clang] [analyzer] Refine default binding preservation in RegionStore (PR #189319)

[Balázs Benics via cfe-commits]

steakhal wrote:

I didn't think it was urgent.
We don't merge when we can't be there to follow it up with a revert.
Currently, all maintainers are on the Eurollvm, thus we will be busy.

There is also a ping once a week policy in llvm, so I find this kind of rapid escalation very unfortunate for setting a precedent.

To be clear, I don't expect to revert this. And it's fine.

https://github.com/llvm/llvm-project/pull/189319