test: Remove ZooKeeper 3.9.3 (#836) #60

Job	Run time
Detect relevant changed files	6s
Run cargo-udeps	2m 9s
Build/Publish amd64 Image	6m 42s
Build/Publish arm64 Image	5m 42s
Package/Publish 0.0.0-dev Helm Chart	29s
Publish/Sign 0.0.0-dev Index	25s
Run OpenShift Preflight Check for 0.0.0-dev-arm64	21s
Run OpenShift Preflight Check for 0.0.0-dev-amd64	22s
Failure Notification	0s
Finished Build and Publish	2s
	16m 18s

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