fix: update kafka version in tests

[wcmitchell]

Summary by Sourcery

Tests:

• Update Kafka version from 3.4.0 to 3.8.0 in test configuration files for different Kafka deployment scenarios including Strimzi ephemeral, Strimzi PVC, and MSK test configurations

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request updates the Kafka version used in the tests to 3.8.0. The Kafka and Strimzi versions were updated in the assertion files for the ephemeral and PVC Kafka tests, as well as the Kafka MSK pod definition.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Updated the Kafka version to 3.8.0 in multiple test files.	Updated Kafka version from 3.4.0 to 3.8.0. Updated Strimzi version from 3.4.0 to 3.8.0.	tests/kuttl/test-kafka-strimzi-ephemeral/01-assert.yaml tests/kuttl/test-kafka-strimzi-pvc/01-assert.yaml tests/kuttl/test-kafka-msk/01-pods.yaml

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[wcmitchell]

closing in favor of #1212