[clang-tidy] Fix false positive in cppcoreguidelines-virtual-class-destructor
Incorrectly triggers for template classes that inherit
from a base class that has virtual destructor.
Any class inheriting from a base that has a virtual destructor
will have their destructor also virtual, as per the Standard:
https://timsong-cpp.github.io/cppwp/n4140/class.dtor#9
> If a class has a base class with a virtual destructor,
> its destructor (whether user- or implicitly-declared) is virtual.
Added unit tests to prevent regression.
Fixes bug https://bugs.llvm.org/show_bug.cgi?id=51912
Differential Revision: https://reviews.llvm.org/D110614