fix: removed test-connection-pods from all charts

[hisImminence]

Which problem does the PR fix?

Same as #3001 but with squashed commits to trigger the CI.

Removes connection pods from the each version of the Helm Charts. They were used in the past to check the health of the applications but are not needed anymore as we only should rely on the health/readiness checks moving forward.

hint for review: Follow the single commits to see the changes separated per camunda-chart

related to: #2984 (comment)

What's in this PR?

Checklist

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[hisImminence]

Closing as same as #3001 and no difference noticed of CI runs even if changes are squashed together.