clang-tidy: Enable cppcoreguidelines-pro-type-cstyle-cast

This will not mark all C Style Casts, but those that could
be problematic and should be looked at.

.clang-tidy

@@ -18,6 +18,7 @@ Checks: >-
   -bugprone-virtual-near-miss,
   -bugprone-unhandled-self-assignment,
   -bugprone-reserved-identifier,
+  cppcoreguidelines-pro-type-cstyle-cast,
   cppcoreguidelines-virtual-class-destructor,
   modernize-make-unique,
   google-build-using-namespace,