[clang] [analyzer] MallocChecker – Fix false positive leak for smart pointers in temporary objects (PR #152751)

[Balazs Benics via cfe-commits]

https://github.com/steakhal commented:

I think it looks pretty good. A lot of improvements!

I don't think I have the time to do a proper focused review, so I'd at this point forward you to @NagyDonat to finish the reviews. 

https://github.com/llvm/llvm-project/pull/152751