Consolidate profiling tests into a manual benchmark GitHub workflow

[rhugonnet]

Since #738, the test_dask.py are moved to a "benchmark/" folder, but not used yet, in anticipation for a manually-triggered benchmarking GitHub workflow.

Need to consolidate once https://github.com/GlacioHack/xdem/pull/775 is finalized. That PR is in xDEM, not GeoUtils. @adebardo @belletva @marinebcht How should we address profiling tests in GeoUtils? Should we move the profiler module from xDEM, or copy it? (it's relatively short)

[marinebcht]

I don't really see the point of having it in both Geoutils and xDem, do you ? I think the https://github.com/GlacioHack/xdem/pull/775 is now finalized, I will look about the transfert :)

[rhugonnet]

OK, yes let's have it only in GeoUtils then. Thanks! 😄