tests: Bluetooth: bsim tests for Periodic Sync Transfer

Implemented:
  * Central sync to broadcaster, connects to peripheral and
    transfers sync. Peripheral Syncs to PA
  * Broadcaster acting Central connects to peripheral
    and transfers sync. Peripheral sync to PA
  * Moved previous bis tests to test_bis.c and
    new PAST tests was added in test_past.c

Signed-off-by: Lucas Mathias Balling <lutb@demant.com>