Use payment IDs for BOLT11 payments

Create inbound BOLT11 records from claimable and claimed events.
Stop pre-creating automatic BOLT11 records when invoices are
generated.

Generate outbound BOLT11 IDs from KeysManager entropy instead of
deriving them from the payment hash.

Co-Authored-By: HAL 9000

Author: tnull

bindings/python/src/ldk_node/test_ldk_node.py

@@ -235,7 +235,7 @@ def test_spontaneous_payment(self):
         self.assertEqual(received_event.custom_records, custom_tlvs)
 
         sender_payment = node_1.payment(keysend_payment_id)
-        receiver_payment = node_2.payment(keysend_payment_id)
+        receiver_payment = node_2.payment(received_event.payment_id)
 
         self.assertIsNotNone(sender_payment)
         self.assertIsNotNone(receiver_payment)