🐛 FIX: BandsData matplotlib with NaN values (#5024)

Use `numpy.nanmin` and `numpy.nanmax` for computing y-limits.

Co-authored-by: Chris Sewell <chrisj_sewell@hotmail.com>

Cherry-pick: d138842

aiida/orm/nodes/data/array/bands.py

@@ -784,9 +784,9 @@ def _matplotlib_get_dict(
 
         # axis limits
         if y_max_lim is None:
-            y_max_lim = numpy.array(bands).max()
+            y_max_lim = numpy.nanmax(bands)
         if y_min_lim is None:
-            y_min_lim = numpy.array(bands).min()
+            y_min_lim = numpy.nanmin(bands)
         x_min_lim = min(x)  # this isn't a numpy array, but a list
         x_max_lim = max(x)
         all_data['x_min_lim'] = x_min_lim