Python ruff fixes

* Python: Clean up imports.
* Python: Clean up error handling example.
* Python: Remove unused local variables
* Python: Avoid comparing against True/False.
* Python: Remove unused name variable.
* Python: Reuse class definition type variable.
* Python: Fix more unused imports
* Black fixes

GrpcInterface/Python/rips/well_log_plot.py

@@ -4,8 +4,7 @@ ResInsight Well Log Plot plot module
 
 import Commands_pb2
 
-from .plot import Plot
-from .pdmobject import PdmObjectBase, add_method
+from .pdmobject import add_method
 from .resinsight_classes import WellLogPlot
 
 from typing import List