Updates kafka integration to the latest 11.x (11.8.1) version.

[mashhurs]

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[rn:skip]

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Why is it important/What is the impact to the user?

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• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files (and/or docker env variables)
• I have added tests that prove my fix is effective or that my feature works

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Just comment with:

• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)
• /run exhaustive tests : Run the exhaustive tests Buildkite pipeline.

[robbavey]

LGTM

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 3f0771e

cc @mashhurs