fix: Auto-create truststore on certificate addition

[sbernauer]

Description

While checking this I noticed TLS handling in druid-operator looks buggy to me.
Given it's Druid I did not further investigate, but restored the previous behavior of keytool.
The test should now pass again.

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]

Started https://testing.stackable.tech/view/02%20Operator%20Tests%20(custom)/job/druid-operator-it-custom/62/

[sbernauer]

Failed test passed locally

        --- PASS: kuttl/harness/ldap_druid-33.0.0_zookeeper-latest-3.9.3_opa-1.4.2_hadoop-latest-3.4.1_ldap-use-tls-true_ldap-no-bind-credentials-false_openshift-false (642.15s)

[maltesander]

LGTM!