[analyzer] Trigger checkLifetimeEnd callback from CFGLifetimeEnds element
This patch adds handling of the `CFGLifetimeEnd` element to the CSA, and
produces a newly created callback `checkLifetimeEnd` for each occurrence
of it.
It is useful to implement detection of dangling pointers as in:
```
void su_use_after_block () { int* p=0; { int x=1; p=&x; } *p = 2; }
// ^ p dangles
```
This patch does not implement the check itself. it is motivated by the
discussion in
https://discourse.llvm.org/t/what-is-the-status-of-scopeend-and-scopebegin/90861
--
upstreamed part of CPP-4539
---------
Co-authored-by: tomasz-kaminski-sonarsource <tomasz.kaminski@sonarsource.com>
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