kaustinen: reorg through the transition is broken

[gballet]

This has been found while trying to sync an already-converted network: the syncing node creates its own block, which is at a timestamp > pragueTime, so it performs the transition. Then the CL starts, finds the rest of the network, and sends an FCU that triggers a reorg. But since the started value is already active in the StateDB, it will try to produce a block in verkle mode, when it should not, and the root mismatch error will be shown.

[gballet]

instructions to reproduce from Gajinder:

pull spindevnets , and in fork-scheduler.sh, set VERGE_EPOCH=0, it will set transition at block 1 without making EL genesis verge
basically will set pragueTime > genesis timestamp but < network genesis time (actually 1 hour before network genesis time)