#14772 Python: Add Project.load_case as object method and forward loadCase to it

RimProject_loadCase loads a grid case from file and returns the case
object. RicfLoadCase forwards to it and wraps the case id in the legacy
loadCaseResult. The hand-written Python Project.load_case() wrapper is
removed since the generated method has the same signature and returns
the most-derived case class.

GrpcInterface/Python/rips/project.py

@@ -83,21 +83,6 @@ def close(self) -> None:
     self._execute_command(closeProject=Empty())
 
 
-@add_method(Project)
-def load_case(self: Project, path: str, grid_only: bool = False) -> Reservoir:
-    """Load a new grid case from the given file path
-
-    Arguments:
-        path(str): file path to case
-    Returns:
-        :class:`rips.generated.generated_classes.Case`
-    """
-    command_reply = self._execute_command(
-        loadCase=Commands_pb2.FilePathRequest(path=path, gridOnly=grid_only)
-    )
-    return self.case(command_reply.loadCaseResult.id)
-
-
 @add_method(Project)
 def selected_cases(self) -> List[Case]:
     """Get a list of all grid cases selected in the project tree