Upgrade log4j to confluent-log4j

[Clarence97]

JIRA ticket here: https://confluentinc.atlassian.net/browse/DGS-1888?page=com.atlassian.jira.plugin.system.issuetabpanels%3Aall-tabpanel

[OneCricketeer]

Is this still needed? Ref #2275

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
0 out of 2 committers have signed the CLA.

❌ patrick-premont
❌ Clarence97
_{You have signed the CLA already but the status is still pending? Let us recheck it.}