Disable modes that do parameter updates if there are no params to update

If all parameters have UPDATE:FALSE set, then we should not let the user
select any mode that does parameter updates.

src/ert/cli/main.py

@@ -74,7 +74,11 @@ def run_cli(args: Namespace, plugin_manager: Optional[ErtPluginManager] = None)
             f"To run {args.mode}, GEN_KW, FIELD or SURFACE parameters are needed. \n"
             f"Please add to file {args.config}"
         )
-
+    if not (
+        True
+        in [p.update for p in ert_config.ensemble_config.parameter_configs.values()]
+    ):
+        ErtCliError(f"All parameters are set to UPDATE:FALSE in {args.config}")
     storage = open_storage(ert_config.ens_path, "w")
 
     if args.mode == WORKFLOW_MODE:

src/ert/gui/simulation/experiment_panel.py

@@ -153,7 +153,9 @@ def __init__(
         )
 
         experiment_type_valid = bool(
-            config.ensemble_config.parameter_configs and config.observations
+            True
+            in [p.update for p in config.ensemble_config.parameter_configs.values()]
+            and config.observations
         )
 
         self.addExperimentConfigPanel(
@@ -198,7 +200,9 @@ def addExperimentConfigPanel(
             sim_item = model.item(item_count)
             assert sim_item is not None
             sim_item.setEnabled(False)
-            sim_item.setToolTip("Both observations and parameters must be defined")
+            sim_item.setToolTip(
+                "Both observations and parameters must be defined.\nThere must be parameters to update."
+            )
             style = self.style()
             assert style is not None
             sim_item.setIcon(