#14772 Python: Add EclipseCase.create_saturation_pressure_plots as object method and forward createSaturationPressurePlots to it

RimEclipseResultCase_createSaturationPressurePlots exposes the time step
(the legacy command hardcodes 0) and returns an error when no plots
could be created. It only shows the plot window when a GUI is running;
the legacy code dereferenced RiaGuiApplication::instance()
unconditionally. RicfCreateSaturationPressurePlots resolves the cases
and loops, treating per-case failures as warnings as before.

The hand-written Case.create_saturation_pressure_plots() Python wrapper
is removed since the generated EclipseCase method shadows it.

GrpcInterface/Python/rips/case.py

@@ -561,17 +561,6 @@ def create_lgr_for_completion(
     )
 
 
-@add_method(Case)
-def create_saturation_pressure_plots(self) -> Any:
-    """
-    Create saturation pressure plots for the current case
-    """
-    case_ids = [self.id]
-    return self._execute_command(
-        createSaturationPressurePlots=Cmd.CreateSatPressPlotRequest(caseIds=case_ids)
-    )
-
-
 @add_method(Case)
 def available_properties(
     self,