PR Summary

As proposed in#18848 (comment) and discussed on today's dev call.

Closes#18848,#19016.

kwargs: I've added kwargs for text properties. While this makes the function do a lot (borderline of too much), it is necessary if we want a full replacement ofset_ticklabels(labels, **text_properties).
One can argue that this is actually too much, in which case we'd have to advertise

# Replaceset_ticks(locs)set_ticklabels(labels, **text_properties)# byset_ticks(locs, labels)tick_params(**text_properties)

Return value:set_ticks() has an undocumented return value (list of the Tick instances). Whileplt.xticks() returns a tuple(locs, labels) (list of Ticks and list of Texts), I don't want to do this here. First, I don't think the setter should return anything at all (but that's how it is for now and deprecating that is probably not worth it). Second, since labels are optional, I'm not even sure if we would want to give the texts only iflabels is not None.