Resolve "you are registering twice the same counter address" warning on Windows Relea...

Resolve "you are registering twice the same counter address" warning on Windows Release builds.

When registering profile counters on optimized Windows build you will get the following logging twice:

"you are registering twice the same counter address"

This happens since the optimizer will collapse cpu_load_1min, cpu_load_5min and cpu_load15min into
the same function on optimized Windows builds and that is not expected by register_internal.

By preventing inlining of cpu_load we can keep the different callback methods unique and optimizer
won't fold them into one single representation in the final binary.