chore: Add 6.1.0 and deprecate 6.0.0

[sweb]

Part of stackabletech/docker-images#1504.

Add 6.1.0 and deprecate 6.0.0. Also, add a new upgrade integration test.

[razvan]

lgtm

[Techassi]

I didn't look at the new integration test, but the rest looks fine.

[Techassi]

Pretty much all tests passed on the first try:

--- PASS: kuttl/harness/druid-connection_superset-4.1.4_openshift-false (125.26s)
--- PASS: kuttl/harness/ldap_superset-6.0.0_ldap-authentication-server-verification-tls_openshift-false (183.19s)
--- PASS: kuttl/harness/ldap_superset-6.0.0_ldap-authentication-insecure-tls_openshift-false (124.09s)
--- PASS: kuttl/harness/ldap_superset-4.1.4_ldap-authentication-no-tls_openshift-false (116.17s)
--- PASS: kuttl/harness/ldap_superset-4.1.4_ldap-authentication-server-verification-tls_openshift-false (117.37s)
--- PASS: kuttl/harness/ldap_superset-4.1.4_ldap-authentication-insecure-tls_openshift-false (113.99s)
--- PASS: kuttl/harness/upgrade_superset-old-6.0.0_superset-new-6.1.0_authentication-none_openshift-false (171.44s)
--- PASS: kuttl/harness/upgrade_superset-old-6.0.0_superset-new-6.1.0_authentication-oidc_openshift-false (219.64s)
--- PASS: kuttl/harness/upgrade_superset-old-4.1.4_superset-new-6.1.0_authentication-none_openshift-false (142.25s)
--- PASS: kuttl/harness/upgrade_superset-old-4.1.4_superset-new-6.1.0_authentication-oidc_openshift-false (175.06s)
--- PASS: kuttl/harness/resources_superset-latest-6.1.0_openshift-false (91.91s)
--- PASS: kuttl/harness/oidc_superset-6.1.0_openshift-false (159.76s)
--- PASS: kuttl/harness/oidc_superset-6.0.0_openshift-false (151.94s)
--- FAIL: kuttl/harness/celery-worker_superset-6.0.0_openshift-false (472.44s)
--- PASS: kuttl/harness/oidc_superset-4.1.4_openshift-false (139.59s)
--- PASS: kuttl/harness/cluster-operation_superset-latest-6.1.0_openshift-false (135.44s)
--- PASS: kuttl/harness/logging_superset-6.1.0_openshift-false (134.90s)
--- PASS: kuttl/harness/logging_superset-4.1.4_openshift-false (103.48s)
--- PASS: kuttl/harness/logging_superset-6.0.0_openshift-false (114.15s)
--- PASS: kuttl/harness/external-access_superset-6.1.0_openshift-false (100.62s)
--- PASS: kuttl/harness/external-access_superset-6.0.0_openshift-false (93.65s)
--- PASS: kuttl/harness/external-access_superset-4.1.4_openshift-false (90.83s)
--- PASS: kuttl/harness/smoke_superset-6.1.0_openshift-false (110.15s)
--- PASS: kuttl/harness/smoke_superset-6.0.0_openshift-false (108.32s)
--- PASS: kuttl/harness/smoke_superset-4.1.4_openshift-false (102.38s)
--- PASS: kuttl/harness/opa_superset-6.1.0_opa-latest-1.16.2_openshift-false (221.89s)
--- PASS: kuttl/harness/opa_superset-6.0.0_opa-latest-1.16.2_openshift-false (208.78s)
--- PASS: kuttl/harness/druid-connection_superset-6.1.0_openshift-false (89.49s)
--- PASS: kuttl/harness/opa_superset-4.1.4_opa-latest-1.16.2_openshift-false (208.06s)
--- PASS: kuttl/harness/druid-connection_superset-6.0.0_openshift-false (87.61s)
--- PASS: kuttl/harness/ldap_superset-6.0.0_ldap-authentication-no-tls_openshift-false (120.39s)
--- PASS: kuttl/harness/ldap_superset-6.1.0_ldap-authentication-server-verification-tls_openshift-false (121.61s)
--- FAIL: kuttl/harness/celery-worker_superset-6.1.0_openshift-false (452.85s)
--- FAIL: kuttl/harness/celery-worker_superset-4.1.4_openshift-false (451.32s)
--- PASS: kuttl/harness/ldap_superset-6.1.0_ldap-authentication-insecure-tls_openshift-false (121.10s)
--- PASS: kuttl/harness/ldap_superset-6.1.0_ldap-authentication-no-tls_openshift-false (119.19s)

Curiously, the celery-worker tests fail with

./create-database.sh doesn't exist in local filesystem

even tho the file clearly exists.

EDIT: Bumping to the latest kuttl version resolved this issue.

--- PASS: kuttl/harness/celery-worker_superset-4.1.4_openshift-false (199.60s)
--- PASS: kuttl/harness/celery-worker_superset-6.1.0_openshift-false (296.49s)
--- PASS: kuttl/harness/celery-worker_superset-6.0.0_openshift-false (185.84s)