Draft: Make track parameter estimation part of track finding algorithm

As discussed a few times in the ACTS-ITk meeting we want to move the parameter estimation from seed into the track finding algorithm and away from the seeding algorithm.

Reason for this is that we may want to make a dynamic choice of processing seeds first inwards and then outwards depending on the location in the detector.

This also reduces complexity by requiring seeds and parameters to align after seeding but only have a single self-contained output. Currently we wire the useTopSP flag into multiple places while at the end of the day we might only need this in the track finding algorithm which makes configuration and code easier.