[Clang] Fix clang build with GCC 7.5 (#206768)
GCC 7.5 rejects two newer C++ idioms:
- LifetimeSafety/FactsGenerator: replace ArrayRef CTAD with an explicit
ArrayRef<const Expr *> to avoid GCC 7's broken brace-init deduction.
- ScalableStaticAnalysisFramework: add explicit std::move() on
unique_ptr<Derived> returns (pre-P1825, GCC 7 won't implicitly move).
No behavior change; restores compatibility with GCC 7.5.
Co-authored-by: Garbowski, Mateusz <mateusz.garbowski@intel.com>
