test: Bump OPA to 1.4.2

[NickLarsenNZ]

Part of stackabletech/docker-images#1084.

Definition of Done Checklist

• Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant
• Please make sure all these things are done and tick the boxes

Author

• Integration tests passed (for non trivial changes)

Reviewer

• Code contains useful comments
• Code contains useful logging statements
• (Integration-)Test cases added
• Documentation added or updated. Follows the style guide.
• Changelog updated
• Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

• Feature Tracker has been updated
• Proper release label has been added
• Roadmap has been updated

[NickLarsenNZ]

Tests pass:

--- PASS: kuttl (372.07s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/opa_airflow-2.10.4_opa-latest-1.4.2_openshift-false (149.58s)
        --- PASS: kuttl/harness/opa_airflow-2.9.3_opa-latest-1.4.2_openshift-false (222.48s)
PASS