Fix Store Mechanism of TrackSeeds for Seed efficiency plotting
This is to fix an issue observed by @fcastill while trying to produce Seed Efficiency plots.
Also, follow up from !63126 (merged) (/cc @lgagnon @adimitri @arastogi @spagan) and from !66977 (merged) (/cc @tstreble)
Changes: adapt mechanism for use on ITk
configuration
Move flags storeTrackSeeds
and storeSiSPSeededTracks
also to ITk tracking passes, and setting default values related to previous config flags