Ensure bot_loop_start is called in hyperopt, too

closes #7001

tests/optimize/test_hyperopt.py

@@ -861,6 +861,7 @@ def test_in_strategy_auto_hyperopt(mocker, hyperopt_conf, tmpdir, fee) -> None:
     hyperopt.backtesting.exchange.get_max_leverage = MagicMock(return_value=1.0)
     assert isinstance(hyperopt.custom_hyperopt, HyperOptAuto)
     assert isinstance(hyperopt.backtesting.strategy.buy_rsi, IntParameter)
+    assert hyperopt.backtesting.strategy.bot_loop_started is True
 
     assert hyperopt.backtesting.strategy.buy_rsi.in_space is True
     assert hyperopt.backtesting.strategy.buy_rsi.value == 35

tests/strategy/strats/hyperoptable_strategy.py

@@ -44,6 +44,11 @@ class HyperoptableStrategy(StrategyTestV2):
             })
         return prot
 
+    bot_loop_started = False
+
+    def bot_loop_start(self):
+        self.bot_loop_started = True
+
     def bot_start(self, **kwargs) -> None:
         """
         Parameters can also be defined here ...