test: Add vitess to the propagators matrix #3026

Job	Run time
kafka / racecar / ubuntu-latest	12m 28s
kafka / rdkafka / ubuntu-latest	16m 11s
mysql / mysql2 / ubuntu-latest	1m 27s
mysql / trilogy / ubuntu-latest	1m 17s
kafka / ruby_kafka / ubuntu-latest	5m 45s
postgresql / pg / ubuntu-latest	3m 34s
postgresql / que / ubuntu-latest	2m 19s
rabbitmq / bunny / ubuntu-latest	1m 7s
redis / redis / ubuntu-latest	1m 4s
redis / resque / ubuntu-latest	1m 51s
redis / sidekiq / ubuntu-latest	6m 2s
other / dalli / ubuntu-latest	2m 31s
other / mongo / ubuntu-latest	2m 36s
	58m 12s

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