Add clang format control for cpp11 features

[hallfox]

These changes minimize the amount of changes coming from the files supporting a simulating C++11, eliminating all discrepancies except the license header. Future versions of sim_cpp11_features.pl should address this issue.

[hallfox]

This is odd, locally I'm formatting these files and it changes nothing. Perhaps this is a clang-format version difference issue. Let me try running with clang-format-14 locally.