Add `test_class_sh_property_non_owning` to CMakeLists.txt (#4590)

* use C++17 syntax to get rid of recursive template instantiations for concatenating type signatures (#4587)

* Apply descr.h `src_loc` change (smart_holder PR #4022) to code added with master PR #4587

* Add test_class_sh_property_non_owning to CMakeLists.txt (fixes oversight in PR #4586)

* Resolve clang-tidy errors.

* clang-tidy auto fix

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Co-authored-by: Konstantin Bespalov <kos5tya@yandex.ru>