#14772 Python: Add View.set_time_step as object method and forward setTimeStep to it

Rim3dView_setTimeStep validates the time step against the owner case
and updates the view. RicfSetTimeStep forwards to it, looping over all
views of the case when viewId is -1. The hand-written Python
View.set_time_step() wrapper is removed since the generated method has
the same name and signature.

Also fix the argument description of the new Rimc methods: the whatsThis
text is the third variadic argument of CAF_PDM_InitScriptableField.

GrpcInterface/Python/rips/view.py

@@ -82,17 +82,6 @@ def apply_flow_diagnostics_cell_result(
     cell_result.update()
 
 
-@add_method(View)
-def set_time_step(self, time_step):
-    """Set the time step for current view"""
-    case_id = self.case().id
-    return self._execute_command(
-        setTimeStep=Cmd.SetTimeStepParams(
-            caseId=case_id, viewId=self.id, timeStep=time_step
-        )
-    )
-
-
 @add_method(View)
 def export_sim_well_fracture_completions(
     self, time_step, simulation_well_names, file_split, compdat_export