Ability to use elapsed-expression and event-reference with bool-expression

In a scenario we can have a start and end trigger / condition. And that will be exported as a event-specification to OpenSCENARIO 2.0. The issue is that we cannot have elapsed-expression and event-reference with other type of expressions such as bool-expression.

For example, elapsed(5s) or (white.time_to_collision(rock01) <= 0s)

Currently OSC2 grammar doesn't support the above given example and resulting in syntax validation error. Hence, proposing to update the OSC2 grammar to support the above given example.