[processing] Fix rasterize dialog openning

Fix #16061

Do not pass in getConsoleCommand just to get commandName for shortHelp.
This avoid errors with non initialized parameters.

Author: arnaud-morvan

python/plugins/processing/algs/gdal/rasterize.py

@@ -163,3 +163,6 @@ def getConsoleCommands(self):
 
         arguments.append(out)
         return ['gdal_rasterize', GdalUtils.escapeAndJoin(arguments)]
+
+    def commandName(self):
+        return "gdal_rasterize"

python/plugins/processing/algs/gdal/rasterize_over.py

@@ -85,3 +85,6 @@ def getConsoleCommands(self):
         arguments.append(ogrRasterLayer)
 
         return ['gdal_rasterize', GdalUtils.escapeAndJoin(arguments)]
+
+    def commandName(self):
+        return "gdal_rasterize"