Using multiple Kafka connectors from the same Spark session doesn't work

[SirOibaf]

This is caused by the addFile method not overwriting the content of the file if the file name matches.
This PR addresses the issue for Spark versions > 3.2 where the addFile method is not needed as the Kafka client authenticates using the certificates in PEM format rather than the JKS format.

This PR adds/fixes/changes...

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How Has This Been Tested?

• Unit Tests
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• Manual Tests on VM

Checklist For The Assigned Reviewer:

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