Allow optional elliptic curve data from database_cremona_ellcurve

If the optional db in istalled, then extra data is passed to the
elliptic curve constructor. Recently unexpected keyword arguments were
changed to an exception, without taking the optional package into
account.

Caused by sagemath#38361

src/sage/schemes/elliptic_curves/ell_rational_field.py

@@ -203,6 +203,9 @@ def __init__(self, ainvs, **kwds):
             self.__regulator = (kwds.pop('regulator'), True)
         if 'torsion_order' in kwds:
             self._set_torsion_order(kwds.pop('torsion_order'))
+        if 'db_extra' in kwds:
+            # optional data provided by database_cremona_ellcurve
+            self.db_extra = kwds.pop('db_extra')
         if kwds:
             raise TypeError(f"unexpected keyword arguments: {kwds}")