BUG: Use initialization for results of find

The specification of the find function changed with
4dda285 but gridproperties import was
not updated for the change. This introduces some subtle inconsistent
behavior.

src/xtgeo/grid3d/_gridprops_import_eclrun.py

@@ -136,11 +136,9 @@ def import_ecl_init_gridproperties(
         grid=grid,
     )
     for result in results:
-        prop = GridProperty()
         grid_properties._names.append(result["name"])
         result["name"] = decorate_name(result["name"], grid.dualporo, fracture=False)
-        for attr, value in result.items():
-            setattr(prop, "_" + attr, value)
+        prop = GridProperty(**result)
 
         grid_properties._props.append(prop)
         grid_properties._dates.append(prop._date)
@@ -248,7 +246,6 @@ def import_ecl_restart_gridproperties(
 
     results = find_gridprops_from_restart_file(pfile.file, names, dates, grid=grid)
     for result in results:
-        prop = GridProperty()
 
         if namestyle == 1:
             sdate = str(result["date"])
@@ -257,9 +254,7 @@ def import_ecl_restart_gridproperties(
             result["name"] = decorate_name(
                 result["name"], grid.dualporo, fracture=False, date=result["date"]
             )
-
-        for attr, value in result.items():
-            setattr(prop, "_" + attr, value)
+        prop = GridProperty(**result)
 
         grid_properties._props.append(prop)
         grid_properties._names.append(prop.name)