Add a More Flexible System for Enabling Profiling

[chrisguitarguy]

But still keep the {enable/disable}Profiling methods on ProfilingConsumer.

I'm thinking something more along the lines of a criteria pattern where the ProfilingConsumer would do something like...

$this->setHandlerOptions([
  self::FLAG => $this->isProfilingEnabled() || $this->profileCriteria->matches($message),
]);

On profile criteria might do the already provided signal handling.