Naive redispatch uses static capacity instead of time-dependent availability

[paragpatil39]

The EnergyNaiveRedispatchStrategy in the naive_strategies.py does not consider the powerplants availability factors while formulating redispatch bids.

This is also then continued in the redispatch market clearing logic while assigning p_max_pu_up values where the difference between the max_power and volume_pivot is considered.

[mthede]

To document from our discussion and potentially include in the future:

Currently, we only allow for dispatching the unit down to min_power. Idea from @paragpatil39: For fully shutting it down, we could submit a second bid with costs including some kind of shut-down costs.