chore(deps): update confluentinc/cp-kafka docker tag to v8

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
confluentinc/cp-kafka	service	major	7.9.5 → 8.1.1
confluentinc/cp-kafka		major	7.9.5 → 8.1.1

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[github-actions]

👋 This pull request has been marked as stale because it has been open with no activity. You can: comment on the issue or remove the stale label to hold stale off for a while, add the keep label to hold stale off permanently, or do nothing. If you do nothing this pull request will be closed eventually by the stale bot

ci is failing

[arielvalentin]

CI is failing

[thompson-tomo]

@arielvalentin lets close this in favour of #2005 which has the fixed ci for the supported libs.

[renovate]

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Because you closed this PR without merging, Renovate will ignore this update. You will not get PRs for any future 8.x releases. But if you manually upgrade to 8.x then Renovate will re-enable minor and patch updates automatically.

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