Deprecate ColorHandler logger

[antonymilne]

Assuming that the RichHandler has become well-loved and accepted as the default logger, we should in all likelihood remove the ColorHandler provided in kedro.extras.logging. Possibly it's worth doing a quick bit of user research to check that no one feels strongly about keeping this in, but I'm pretty sure that no one really uses it and it will be redundant following the introduction of rich.

This is a breaking change - we need to add deprecation warnings in 0.18.x and then remove it in 0.19.

Note that when we have removed this and moved all extras.datasets out of kedro then all that will be left in kedro.extras is the ipython extension. Given that this namespace is probably changing to kedro.ipython, we will very nearly be at the point of being able to remove kedro.extras altogether 🥳

[merelcht]

Discussed in sprint planning that we can just remove it and don't need to check with users first.