chore: update tests and docs to use bitnamilegacy

[xeniape]

Description

Part of stackabletech/issues#749 Quickfix
This PR updates the tests and docs to use the bitnamylegacy repository for bitnami images. All affected tests, commands and getting started scripts ran successfully.

Integrationstests:

--- PASS: kuttl (635.40s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/kerberos-hdfs_postgres-12.5.6_hive-4.0.1_hdfs-latest-3.4.1_zookeeper-latest-3.9.3_krb5-1.21.1_openshift-false_kerberos-realm-PROD.MYCORP_kerberos-backend-mit (370.21s)
        --- PASS: kuttl/harness/kerberos-hdfs_postgres-12.5.6_hive-3.1.3_hdfs-latest-3.4.1_zookeeper-latest-3.9.3_krb5-1.21.1_openshift-false_kerberos-realm-PROD.MYCORP_kerberos-backend-mit (370.67s)
        --- PASS: kuttl/harness/kerberos-hdfs_postgres-12.5.6_hive-4.0.0_hdfs-latest-3.4.1_zookeeper-latest-3.9.3_krb5-1.21.1_openshift-false_kerberos-realm-PROD.MYCORP_kerberos-backend-mit (265.17s)
PASS

--- PASS: kuttl (424.68s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/kerberos-s3_postgres-12.5.6_hive-3.1.3_krb5-1.21.1_openshift-false_s3-use-tls-false_kerberos-realm-PROD.MYCORP_kerberos-backend-mit (140.28s)
        --- PASS: kuttl/harness/kerberos-s3_postgres-12.5.6_hive-4.0.0_krb5-1.21.1_openshift-false_s3-use-tls-true_kerberos-realm-PROD.MYCORP_kerberos-backend-mit (160.42s)
        --- PASS: kuttl/harness/kerberos-s3_postgres-12.5.6_hive-4.0.1_krb5-1.21.1_openshift-false_s3-use-tls-true_kerberos-realm-PROD.MYCORP_kerberos-backend-mit (133.18s)
        --- PASS: kuttl/harness/kerberos-s3_postgres-12.5.6_hive-4.0.0_krb5-1.21.1_openshift-false_s3-use-tls-false_kerberos-realm-PROD.MYCORP_kerberos-backend-mit (130.66s)
        --- PASS: kuttl/harness/kerberos-s3_postgres-12.5.6_hive-3.1.3_krb5-1.21.1_openshift-false_s3-use-tls-true_kerberos-realm-PROD.MYCORP_kerberos-backend-mit (134.35s)
        --- PASS: kuttl/harness/kerberos-s3_postgres-12.5.6_hive-4.0.1_krb5-1.21.1_openshift-false_s3-use-tls-false_kerberos-realm-PROD.MYCORP_kerberos-backend-mit (133.60s)
PASS

--- PASS: kuttl (190.20s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/logging_postgres-12.5.6_hive-4.0.1_openshift-false (103.18s)
        --- PASS: kuttl/harness/logging_postgres-12.5.6_hive-3.1.3_openshift-false (109.46s)
        --- PASS: kuttl/harness/logging_postgres-12.5.6_hive-4.0.0_openshift-false (87.01s)
PASS

--- PASS: kuttl (383.28s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/smoke_postgres-12.5.6_hive-3.1.3_openshift-false_s3-use-tls-false (129.67s)
        --- PASS: kuttl/harness/smoke_postgres-12.5.6_hive-4.0.0_openshift-false_s3-use-tls-true (142.24s)
        --- PASS: kuttl/harness/smoke_postgres-12.5.6_hive-4.0.0_openshift-false_s3-use-tls-false (120.81s)
        --- PASS: kuttl/harness/smoke_postgres-12.5.6_hive-3.1.3_openshift-false_s3-use-tls-true (123.06s)
        --- PASS: kuttl/harness/smoke_postgres-12.5.6_hive-4.0.1_openshift-false_s3-use-tls-true (127.82s)
        --- PASS: kuttl/harness/smoke_postgres-12.5.6_hive-4.0.1_openshift-false_s3-use-tls-false (117.95s)
PASS

--- PASS: kuttl (86.01s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/upgrade_postgres-12.5.6_hive-old-3.1.3_hive-new-4.0.1_openshift-false (85.98s)
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

[NickLarsenNZ]

LGTM