[processing] dont use hidden outputs when exporting to python or displaying alg help

fixes #14998

Conflicts:
	python/plugins/processing/core/GeoAlgorithm.py

Author: volaya

python/plugins/processing/core/GeoAlgorithm.py

@@ -462,7 +462,8 @@ def __str__(self):
         for param in self.parameters:
             s += '\t' + str(param) + '\n'
         for out in self.outputs:
-            s += '\t' + str(out) + '\n'
+            if not out.hidden:
+                s += '\t' + str(out) + '\n'
         s += '\n'
         return s
 

python/plugins/processing/modeler/ModelerAlgorithm.py

@@ -154,10 +154,11 @@ def _toString(v):
                     return str(value)
             params.append(_toString(value))
         for out in self.algorithm.outputs:
-            if out.name in self.outputs:
-                params.append(safeName(self.outputs[out.name].description).lower())
-            else:
-                params.append(str(None))
+            if not out.hidden:
+                if out.name in self.outputs:
+                    params.append(safeName(self.outputs[out.name].description).lower())
+                else:
+                    params.append(str(None))
         s.append("outputs_%s=processing.runalg('%s', %s)" % (self.name, self.consoleName, ",".join(params)))
         return s