Global StarChips for pre-scan and the parameter loop

This is an attempt to address the same issue that !477 (closed) tries to fix. A global Star frontend StarChipsGlobal is added for the pre-scan and parameter loop as @bgallop suggested. The global Star front end accesses the chip configuration of all individual FEs via Bookkeeper in order to decide whether a broadcast write is possible, or the register write has to be done chip by chip to avoid overwriting chip configurations.