Ran clang-format on all C++ sources

[UebelAndre]

Minor cleanup. The following config was used:

---
BasedOnStyle: Google
...

[illicitonion]

I'm not sure this is worthwhile... If we're going to apply formatting, I think I'd want to have CI enforce that we stay formatted, but given we only really have C/C++ in tests and examples, I'm not sure it's worth gating CI on test formatting... Is there a strong motivation here?

[UebelAndre]

I'm not sure this is worthwhile... If we're going to apply formatting, I think I'd want to have CI enforce that we stay formatted, but given we only really have C/C++ in tests and examples, I'm not sure it's worth gating CI on test formatting... Is there a strong motivation here?

I was testing some other rules I wrote to run clang-format and thought I'd just push the changes to have cleaner code. This PR can be rejected since it doesn't add enforcement but figured the cleanup wouldn't hurt.