VW FPv2: reduce number of ECU queries (#24939)

* only send valid/needed queries

* just do volkswagen

* clean up

* add parameter name

clean up

* add test for whitelist

* rename

* Update selfdrive/car/fw_versions.py

Co-authored-by: Jason Young <46612682+jyoung8607@users.noreply.github.com>

* fix test

* log response addresses

* bump cereal

* handle response pending with IsoTpParallelQuery

* remove response pending stuff

* temporarily disregard cache for easier testing

* revert this

Co-authored-by: Jason Young <46612682+jyoung8607@users.noreply.github.com>

selfdrive/car/fw_versions.py

@@ -148,12 +148,14 @@ REQUESTS: List[Request] = [
     "volkswagen",
     [VOLKSWAGEN_VERSION_REQUEST_MULTI],
     [VOLKSWAGEN_VERSION_RESPONSE],
+    whitelist_ecus=[Ecu.srs, Ecu.eps, Ecu.fwdRadar],
     rx_offset=VOLKSWAGEN_RX_OFFSET,
   ),
   Request(
     "volkswagen",
     [VOLKSWAGEN_VERSION_REQUEST_MULTI],
     [VOLKSWAGEN_VERSION_RESPONSE],
+    whitelist_ecus=[Ecu.engine, Ecu.transmission],
   ),
   # Mazda
   Request(