Merge various restore tasks into one Sync target

Merge various restore tasks into one Sync target

There were various restore targets happening independently
when they should all be combined so the sync step can be
independent from the build step. This change merges them
together under the Sync target.

In particular this moves RestoreOptData and RestoreNETCorePlatforms
to be part of the sync step instead of being individually ran.

Pass BuildType to sync commands so optdata gets restored correctly