Added unit tests to "tox -e parallel" environment (#2123) #26

Job	Run time
Unit (3.8, blacksmith-4vcpu-ubuntu-2204)	1m 26s
Unit (3.9, blacksmith-4vcpu-ubuntu-2204)	1m 35s
Unit (3.10, blacksmith-4vcpu-ubuntu-2204)	1m 50s
Unit (3.11, blacksmith-4vcpu-ubuntu-2204)	1m 30s
Unit (3.12, blacksmith-4vcpu-ubuntu-2204)	1m 28s
Integration (3.8, py-amqp, false)	1m 22s
Integration (3.8, py-redis, false)	1m 14s
Integration (3.8, py-mongodb, false)	3m 18s
Integration (3.8, py-kafka, false)	2m 29s
Integration (3.9, py-amqp, false)	1m 14s
Integration (3.9, py-redis, false)	1m 16s
Integration (3.9, py-mongodb, false)	4m 48s
Integration (3.9, py-kafka, false)	2m 12s
Integration (3.10, py-amqp, false)	1m 21s
Integration (3.10, py-redis, false)	1m 15s
Integration (3.10, py-mongodb, false)	3m 20s
Integration (3.10, py-kafka, false)	2m 54s
Integration (3.11, py-amqp, false)	1m 25s
Integration (3.11, py-redis, false)	1m 8s
Integration (3.11, py-mongodb, false)	3m 11s
Integration (3.11, py-kafka, false)	2m 7s
Integration (3.12, py-amqp, false)	1m 31s
Integration (3.12, py-redis, false)	1m 15s
Integration (3.12, py-mongodb, false)	3m 21s
Integration (3.12, py-kafka, false)	2m 13s
Integration (pypy3.10, py-amqp, true)	1m 28s
Integration (pypy3.10, py-redis, true)	1m 22s
Integration (pypy3.10, py-mongodb, true)	5m 0s
	58m 33s

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