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 (347.04s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/smoke_superset-4.1.2_openshift-false (195.27s)
        --- PASS: kuttl/harness/smoke_superset-4.0.2_openshift-false (200.03s)
        --- PASS: kuttl/harness/smoke_superset-4.1.1_openshift-false (151.74s)
PASS

--- PASS: kuttl (90.74s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/resources_superset-latest-4.1.2_openshift-false (90.72s)
PASS

--- PASS: kuttl (476.04s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/opa_superset-4.0.2_opa-latest-1.4.2_openshift-false (234.70s)
        --- PASS: kuttl/harness/opa_superset-4.1.2_opa-latest-1.4.2_openshift-false (234.84s)
        --- PASS: kuttl/harness/opa_superset-4.1.1_opa-latest-1.4.2_openshift-false (241.33s)
PASS

--- PASS: kuttl (320.49s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/oidc_superset-4.1.2_openshift-false (165.86s)
        --- PASS: kuttl/harness/oidc_superset-4.0.2_openshift-false (166.14s)
        --- PASS: kuttl/harness/oidc_superset-4.1.1_openshift-false (154.63s)
PASS

--- PASS: kuttl (270.47s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/logging_superset-4.0.2_openshift-false (139.00s)
        --- PASS: kuttl/harness/logging_superset-4.1.2_openshift-false (156.45s)
        --- PASS: kuttl/harness/logging_superset-4.1.1_openshift-false (131.45s)
PASS

--- PASS: kuttl (690.91s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/ldap_superset-4.0.2_ldap-authentication-insecure-tls_openshift-false (132.17s)
        --- PASS: kuttl/harness/ldap_superset-4.1.1_ldap-authentication-server-verification-tls_openshift-false (153.27s)
        --- PASS: kuttl/harness/ldap_superset-4.1.1_ldap-authentication-insecure-tls_openshift-false (136.64s)
        --- PASS: kuttl/harness/ldap_superset-4.1.1_ldap-authentication-no-tls_openshift-false (136.98s)
        --- PASS: kuttl/harness/ldap_superset-4.1.2_ldap-authentication-no-tls_openshift-false (136.79s)
        --- PASS: kuttl/harness/ldap_superset-4.1.2_ldap-authentication-server-verification-tls_openshift-false (254.79s)
        --- PASS: kuttl/harness/ldap_superset-4.0.2_ldap-authentication-server-verification-tls_openshift-false (145.24s)
        --- PASS: kuttl/harness/ldap_superset-4.0.2_ldap-authentication-no-tls_openshift-false (140.93s)
        --- PASS: kuttl/harness/ldap_superset-4.1.2_ldap-authentication-insecure-tls_openshift-false (140.05s)
PASS

--- PASS: kuttl (225.20s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/external-access_superset-4.0.2_openshift-false (113.77s)
        --- PASS: kuttl/harness/external-access_superset-4.1.2_openshift-false (115.62s)
        --- PASS: kuttl/harness/external-access_superset-4.1.1_openshift-false (111.41s)
PASS

--- PASS: kuttl (209.58s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/druid-connection_superset-4.0.2_openshift-false (103.61s)
        --- PASS: kuttl/harness/druid-connection_superset-4.1.1_openshift-false (102.52s)
        --- PASS: kuttl/harness/druid-connection_superset-4.1.2_openshift-false (209.56s)
PASS

--- PASS: kuttl (113.68s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/cluster-operation_superset-latest-4.1.2_openshift-false (113.66s)
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