chore: update tests to use bitnamilegacy

[xeniape]

Description

This was missed during the bitnami migration. Part of stackabletech/issues#749 Quickfix.
This PR updates the tests to use the bitnamilegacy repository for bitnami images. All affected tests ran successfully.

--- FAIL: kuttl (1176.73s)
    --- FAIL: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/ldap_nifi-1.27.0_zookeeper-latest-3.9.3_ldap-use-tls-false_openshift-false (462.91s)
        --- PASS: kuttl/harness/ldap_nifi-1.28.1_zookeeper-latest-3.9.3_ldap-use-tls-true_openshift-false (467.93s)
        --- PASS: kuttl/harness/ldap_nifi-2.4.0_zookeeper-latest-3.9.3_ldap-use-tls-false_openshift-false (278.90s)
        --- PASS: kuttl/harness/ldap_nifi-1.28.1_zookeeper-latest-3.9.3_ldap-use-tls-false_openshift-false (200.78s)
        --- FAIL: kuttl/harness/ldap_nifi-2.4.0_zookeeper-latest-3.9.3_ldap-use-tls-true_openshift-false (534.09s)
        --- PASS: kuttl/harness/ldap_nifi-1.27.0_zookeeper-latest-3.9.3_ldap-use-tls-true_openshift-false (229.10s)
FAIL

--- PASS: kuttl (209.71s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/ldap_nifi-2.4.0_zookeeper-latest-3.9.3_ldap-use-tls-true_openshift-false (209.69s)
PASS

--- PASS: kuttl (593.59s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/iceberg_nifi-iceberg-2.4.0_zookeeper-latest-3.9.3_opa-l-1.4.2_hdfs-l-3.4.1_hive-l-4.0.1_trino-l-476_krb5-1.21.1_iceberg-use-kerberos-false_kerberos-realm-PROD.MYCORP_openshift-false (541.88s)
        --- PASS: kuttl/harness/iceberg_nifi-iceberg-2.4.0_zookeeper-latest-3.9.3_opa-l-1.4.2_hdfs-l-3.4.1_hive-l-4.0.1_trino-l-476_krb5-1.21.1_iceberg-use-kerberos-true_kerberos-realm-PROD.MYCORP_openshift-false (593.58s)
PASS

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

[sbernauer]

Thx!