Small Fixes while testing Cuda 13 (#818)

* removed cupy result_type hack fixes #816

* fixed aspect unit test

* fixed the equal_interval dask numpy case to call compute() on the nanmax and nanmin functions.

* refactored focal_stats for cupy arrays

* fixed viewshed test

Author: brendancol

xrspatial/classify.py

@@ -739,10 +739,15 @@ def _run_equal_interval(agg, k, module):
 
     max_data = module.nanmax(data)
     min_data = module.nanmin(data)
+
     if module == cupy:
         min_data = min_data.get()
         max_data = max_data.get()
 
+    if module == da:
+        min_data = min_data.compute()
+        max_data = max_data.compute()
+
     width = (max_data - min_data) * 1.0 / k
     cuts = module.arange(min_data + width, max_data + width, width)
     l_cuts = cuts.shape[0]