Add OpenAPI client generation #928

Job	Run time
build-dse (jdk8, LifecycleIT)	15m 27s
build-dse (jdk8, KeepAliveIT)	12m 15s
build-dse (jdk8, NonDestructiveOpsIT)	17m 33s
build-dse (jdk8, DestructiveOpsIT)	8m 25s
build-dse (jdk8, DSESpecificIT)	8m 12s
build-dse (ubi, LifecycleIT)	11m 43s
build-dse (ubi, KeepAliveIT)	7m 59s
build-dse (ubi, NonDestructiveOpsIT)	15m 47s
build-dse (ubi, DestructiveOpsIT)	7m 13s
build-dse (ubi, DSESpecificIT)	7m 6s
build-oss (3.11, LifecycleIT)	7m 22s
build-oss (3.11, KeepAliveIT)	7m 44s
build-oss (3.11, NonDestructiveOpsIT)	12m 47s
build-oss (3.11, DestructiveOpsIT)	6m 47s
build-oss (4.0, LifecycleIT)	11m 19s
build-oss (4.0, KeepAliveIT)	6m 57s
build-oss (4.0, NonDestructiveOpsIT)	13m 29s
build-oss (4.0, DestructiveOpsIT)	7m 39s
build-oss (4.1, LifecycleIT)	9m 50s
build-oss (4.1, KeepAliveIT)	7m 56s
build-oss (4.1, NonDestructiveOpsIT)	6h 0m 16s
build-oss (4.1, DestructiveOpsIT)	6m 20s
build-oss (3.11_ubi, LifecycleIT)	9m 7s
build-oss (3.11_ubi, KeepAliveIT)	7m 40s
build-oss (3.11_ubi, NonDestructiveOpsIT)	11m 30s
build-oss (3.11_ubi, DestructiveOpsIT)	6m 30s
build-oss (4.0_ubi, LifecycleIT)	9m 7s
build-oss (4.0_ubi, KeepAliveIT)	8m 5s
build-oss (4.0_ubi, NonDestructiveOpsIT)	14m 58s
build-oss (4.0_ubi, DestructiveOpsIT)	6m 37s
build-oss (4.1_ubi, LifecycleIT)	10m 16s
build-oss (4.1_ubi, KeepAliveIT)	9m 32s
build-oss (4.1_ubi, NonDestructiveOpsIT)	13m 17s
build-oss (4.1_ubi, DestructiveOpsIT)	6m 51s
build-dse7	4m 36s
Publish DSE 6.8 Ubuntu image	0s
Publish DSE 6.8 UBI 8 image	0s
Publish ${{ matrix.cassandra-version }} Cassandra image	0s
	11h 28m 12s

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