fix: first plug vehicles from queue, then handle arriving vehicles #6960

Job	Run time
build (matsim)	20s
build (contribs/vsp)	5m 6s
build (contribs/common)	8m 44s
build (contribs/taxi)	4m 35s
build (contribs/minibus)	7m 29s
build (contribs/signals)	6m 23s
build (contribs/bicycle)	2m 5s
build (contribs/cadytsIntegration)	1m 5s
build (contribs/drt)	5m 50s
build (contribs/drt-extensions)	7m 1s
build (contribs/discrete_mode_choice)	1m 43s
build (contribs/carsharing)	2m 55s
build (contribs/commercialTrafficApplications)	4m 18s
build (contribs/av)	2m 22s
build (contribs/locationchoice)	1m 31s
build (contribs/ev)	1m 10s
build (contribs/dvrp)	1m 6s
build (contribs/emissions)	3m 9s
build (contribs/decongestion)	1m 30s
build (contribs/noise)	1m 26s
build (contribs/accidents)	49s
build (contribs/freight)	10m 9s
build (contribs/freightreceiver)	56s
build (contribs/parking)	1m 53s
build (contribs/matrixbasedptrouter)	1m 3s
build (contribs/accessibility)	53s
build (contribs/integration)	54s
build (contribs/multimodal)	3m 15s
build (contribs/protobuf)	1m 17s
build (contribs/shared_mobility)	2m 13s
build (contribs/socnetsim)	2m 44s
build (contribs/sumo)	50s
build (contribs/pseudosimulation)	1m 26s
build (contribs/railsim)	3m 16s
build (contribs/roadpricing)	2m 31s
build (contribs/analysis)	1m 5s
build (contribs/hybridsim)	1m 1s
build (contribs/informed-mode-choice)	6m 37s
build (contribs/otfvis)	54s
build (contribs/osm)	51s
build (contribs/application)	2m 40s
build (contribs/simwrapper)	7m 4s
build (contribs/sbb-extensions)	1m 2s
build (contribs/simulatedannealing)	1m 9s
build (benchmark)	50s
verify-all-jobs-successful (push-or-external-PR)	1s
	2h 7m 11s

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