chore: use new testing-tools image

[dervoeti]

Description

Part of stackabletech/issues#767

This uses the new oci.stackable.tech/sdp/testing-tools/hive image.

Ran some tests to verify they still work:

--- PASS: kuttl (215.76s)
--- PASS: kuttl/harness (0.00s)
--- PASS: kuttl/harness/smoke_postgres-12.5.6_hive-4.2.0_opa-latest-1.8.0_openshift-false_s3-use-tls-false_opa-use-tls-false (215.74s)

--- PASS: kuttl (182.16s)
--- PASS: kuttl/harness (0.00s)
--- PASS: kuttl/harness/logging_postgres-12.5.6_hive-3.1.3_openshift-false (182.13s)

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

• Changes are OpenShift compatible
• CRD changes approved
• CRD documentation for all fields, following the style guide.
• Helm chart can be installed and deployed operator works
• Integration tests passed (for non trivial changes)
• Changes need to be "offline" compatible
• Links to generated (nightly) docs added
• Release note snippet added

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
• Links to generated (nightly) docs added
• Release note snippet added
• Add type/deprecation label & add to the deprecation schedule
• Add type/experimental label & add to the experimental features tracker

[razvan]

lgtm

[razvan]

lgtm