[clang-tidy] Extend cert-oop57-cpp to check non-zero memset values

Clang Tidy check cert-oop57-cpp now checks for arbitrary-valued
arguments in memset expressions containing non-trivially
default-constructible instances. Previously it only checked literal 0 values.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D126186