chore: add support for OpenSearch 3.6.0

[razvan]

Description

Part of stackabletech/docker-images#1500

Depends on:

• chore(opensearch-dasboards): update versions for 26.7 release docker-images#1551
• chore(opensearch): update versions for release 26.7 docker-images#1549

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

• 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]

--- FAIL: kuttl (2046.44s)
    --- FAIL: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/security-config_opensearch-3.6.0 (284.27s)
        --- FAIL: kuttl/harness/smoke_opensearch-3.6.0_opensearch_home-_stackable_opensearch_server-use-tls-false (611.50s)
        --- FAIL: kuttl/harness/logging_opensearch-3.6.0 (1005.15s)
        --- PASS: kuttl/harness/ldap_opensearch-3.6.0_opensearch_home-_stackable_opensearch (207.05s)
        --- PASS: kuttl/harness/smoke_opensearch-3.6.0_opensearch_home-_stackable_opensearch_server-use-tls-true (222.77s)
        --- PASS: kuttl/harness/metrics_opensearch-3.6.0 (313.02s)
        --- PASS: kuttl/harness/external-access_opensearch-3.6.0_opensearch_home-_stackable_opensearch (242.64s)
        --- PASS: kuttl/harness/backup-restore_opensearch-3.6.0_s3-use-tls-true_release-0.0.0-dev (287.56s)
        --- PASS: kuttl/harness/opensearch-dashboards_opensearch-3.6.0_opensearch_home-_stackable_opensearch_server-use-tls-true_release-0.0.0-dev (370.26s)
        --- PASS: kuttl/harness/security-disabled_opensearch-3.6.0_opensearch_home-_stackable_opensearch (123.07s)
        --- PASS: kuttl/harness/opensearch-dashboards_opensearch-3.6.0_opensearch_home-_stackable_opensearch_server-use-tls-false_release-0.0.0-dev (260.33s)
FAIL
ERROR:root:kuttl failed

Second try:

--- PASS: kuttl (159.25s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/smoke_opensearch-3.6.0_opensearch_home-_stackable_opensearch_server-use-tls-false (159.24s)
PASS

[siegfriedweber]

I adapted the Vector unit tests.

Now it looks good to me.