--hpx:print-bind doesn't work with --hpx:pu-step

[brycelelbach]

--hpx:print-bind does not work with --hpx:pu-step. It would be nice if we had a diagnostic option to validate affinity settings that worked with --hpx:pu-step.

For reference, src/hpx_init.cpp line 602 is where we disable --hpx:print-bind for --hpx:pu-step (and I did try just disabling that error to confirm that --hpx:print-bind does not in fact work with --hpx:pu-step).

[hkaiser]

This problem has been introduced at the point when we made --hpx:bind=balanced the default (#2180). This was done by defining an implied value for this command line option, essentially making it present always.
This leads to the issue that now --hpx:pu-step is unusable as it is not allowed to be used together with --hpx:bind.

The easiest workaround for now would be to revert the patch related to --hpx:bind=balanced.

[hkaiser]

@brycelelbach I think I know how to fix this and will try to get a PR ready asap.