Upgrade MLflow client (#366) #224

Job	Run time
build-api	2m 3s
build-cluster-init	13s
build-router	56s
build-ui	7m 44s
build-test-experiment-engine-plugin	36s
release-rules	4s
test-engines-experiment	1m 21s
test-engines-router	3m 5s
test-api	5m 31s
test-e2e (In-cluster credentials; API e2e)	13m 13s
test-e2e (Remote cluster credentials; SDK e2e)	14m 6s
publish / publish-app	1m 17s
publish / publish-router	8s
	50m 17s

Provide feedback