test: Remove ZooKeeper 3.9.3 (#784) #37

Job	Run time
Detect relevant changed files	4s
Build/Publish amd64 Image	6m 32s
Build/Publish arm64 Image	5m 28s
Run cargo-udeps	1m 52s
Publish/Sign 0.0.0-dev Index	33s
Package/Publish 0.0.0-dev Helm Chart	31s
Failure Notification	-1s
Run OpenShift Preflight Check for 0.0.0-dev-amd64	19s
Run OpenShift Preflight Check for 0.0.0-dev-arm64	20s
Finished Build and Publish	3s
	15m 41s

Provide feedback