tests: update force_sell test to not use empty amount column

tests/rpc/test_rpc.py

@@ -762,7 +762,7 @@ def test_rpc_force_exit(default_conf, ticker, fee, mocker) -> None:
     freqtradebot.enter_positions()
     # make an limit-buy open trade
     trade = Trade.session.scalars(select(Trade).filter(Trade.id == "3")).first()
-    filled_amount = trade.amount / 2
+    filled_amount = trade.amount_requested / 2
     # Fetch order - it's open first, and closed after cancel_order is called.
     mocker.patch(
         f"{EXMS}.fetch_order",
@@ -799,7 +799,7 @@ def test_rpc_force_exit(default_conf, ticker, fee, mocker) -> None:
 
     cancel_order_mock.reset_mock()
     trade = Trade.session.scalars(select(Trade).filter(Trade.id == "3")).first()
-    amount = trade.amount
+    amount = trade.amount_requested
     # make an limit-sell open order trade
     mocker.patch(
         f"{EXMS}.fetch_order",
@@ -832,7 +832,7 @@ def test_rpc_force_exit(default_conf, ticker, fee, mocker) -> None:
     assert cancel_order_mock.call_count == 0
 
     trade = Trade.session.scalars(select(Trade).filter(Trade.id == "4")).first()
-    amount = trade.amount
+    amount = trade.amount_requested
     # make an limit-buy open trade, if there is no 'filled', don't sell it
     mocker.patch(
         f"{EXMS}.fetch_order",