[clang][analyzer] Add more wide-character functions to CStringChecker

Support for functions wmempcpy, wmemmove, wmemcmp is added to the checker.
The same tests are copied that exist for the non-wide versions, with
non-wide functions and character types changed to the wide version.

Reviewed By: martong

Differential Revision: https://reviews.llvm.org/D130470

GitOrigin-RevId: 501faaa0d65e9814566ef65e58d834c155553b8a
3 files changed