fix: Implement migration adapter check for textual settings parameters.

doc/changelog.d/4515.fixed.md

@@ -0,0 +1 @@
+Implement migration adapter check for textual settings parameters.

src/ansys/fluent/core/solver/flobject.py

@@ -686,10 +686,13 @@ def set_state(self, state: StateT | None = None, **kwargs):
         allowed_types = (str, VariableDescriptor)
 
         if not isinstance(state, allowed_types):
-            expected = " or ".join(t.__name__ for t in allowed_types)
-            raise TypeError(
-                f"Expected state to be {expected}, got {type(state).__name__}."
-            )
+            if self._has_migration_adapter:
+                return self.base_set_state(state=state, **kwargs)
+            else:
+                expected = " or ".join(t.__name__ for t in allowed_types)
+                raise TypeError(
+                    f"Expected state to be {expected}, got {type(state).__name__}."
+                )
         return self.base_set_state(state=_to_field_name_str(state), **kwargs)