remove/integrate old trace.{c,h} into tracing.h

[nopeslide]

I did not remove the original trace.{c,h} files and left the inference and testing files as they are. the "old" trace.{c,h} must be integrated into tracing.h or at least all calls to it should be mapped to functions/macros in tracing.h

Originally posted by @nopeslide in https://github.com/alrevuelta/cONNXr/pull/49#issuecomment-669097542