upgrade 3.x to CE 3.5.1 / fs2 3.8.0

Hello! I'm working on some dependency updates for $work and fs2-kafka is keeping us on cats-effect 3.4.11 (aka before the async cancellation changes) and fs2 3.6.1

I noticed that CE + fs2 upgrades are ignored in the scala-steward dependencies for 3.x, and I found a TODO regarding the update:

fs2-kafka/modules/core/src/main/scala/fs2/kafka/KafkaProducer.scala

Lines 208 to 209 in e4376d1

    
           // TODO: replace the above with the following once CE3.5.0 is out 
        
           // F.fromFutureCancelable(F.delay(promise.future))

Is there a plan or anything in progress for that version bump yet? If not (and if it would be helpful) I could see how far I get and open up a PR? Since they were explicitly ignored I didn't want to jump in, in case I'm missing important context

While the CE version hasn't been upgraded yet, the library should already be compatible with the new cancelation stuff, as of #1187.

Ah yes, I deployed yesterday with CE 3.5.1 and fs2-kafka 3.0.1 and everything seems to be going well (touch wood). I'd still be happy to help with anything if you'd like it :)

My organization is interested in this upgrade as 3.5.1 offers the ability to override def onCpuStarvationWarn(metrics: CpuStarvationWarningMetrics): IO[Unit] in IOApp trait which confusingly logs some warning to stderr. Is there anything I can contribute with to make it happen?

@aartigao, hi! Thank you for updating the libraries. Are you planning to make a release anytime soon? It seems like a lot of people would be interested in this update.

Yup, that's the intention. But I want to make sure I don't mess with anything and have support from the core maintainers 😅

	// TODO: replace the above with the following once CE3.5.0 is out
	// F.fromFutureCancelable(F.delay(promise.future))