Remove fixed size int test in clang-tidy.
Remove fixed size int test in clang-tidy.

The check is to use int64_t instead of long long.  At the moment it creates
a lot of noise.  Adjusting the code is a larger undertaking so I'm turning it
off for now.  Once the code is fixed for it then we'll turn it back on.

ornladios/ADIOS2,JasonRuonanWang/ADIOS2,ornladios/ADIOS2,JasonRuonanWang/ADIOS2,ornladios/ADIOS2,JasonRuonanWang/ADIOS2,JasonRuonanWang/ADIOS2,ornladios/ADIOS2,JasonRuonanWang/ADIOS2,ornladios/ADIOS2