Add current_time to bot_loop_start callbak

freqtrade/templates/strategy_subtemplates/strategy_methods_advanced.j2

@@ -1,5 +1,5 @@
 
-def bot_loop_start(self, **kwargs) -> None:
+def bot_loop_start(self, current_time: datetime, **kwargs) -> None:
     """
     Called at the start of the bot iteration (one loop).
     Might be used to perform pair-independent tasks
@@ -8,6 +8,7 @@ def bot_loop_start(self, **kwargs) -> None:
     For full documentation please go to https://www.freqtrade.io/en/latest/strategy-advanced/
 
     When not implemented by a strategy, this simply does nothing.
+    :param current_time: datetime object, containing the current datetime
     :param **kwargs: Ensure to keep this here so updates to this won't break your strategy.
     """
     pass