[clang] [clang][analyzer] CallAndMessage warnings at pointer to uninitialized struct (PR #164600)

[Balázs Kéri via cfe-commits]

balazske wrote:

The new option affects only the ArgPointeeInitializedness check (not ArgInitializedness) to not change existing behavior. (Documentation should be updated.)

https://github.com/llvm/llvm-project/pull/164600