Fix tests in CI · whatyouhide/xandra@cc86175

test batch of type "unlogged" producing warning (WarningTest)

test execute/3 returns an error if the cluster is not connected to any node (Xandra.ClusterTest)

test resiliency when a single connection goes down (Xandra.ClusterTest)

test resiliency reconnects to the control connection if it goes down (Xandra.ClusterTest)

test prepare/3 when the connection goes down mid request (XandraToxiproxyTest)

Process completed with exit code 2.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/setup-java@v2, jwalton/gh-docker-logs@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

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