chore: Replace serde_yaml with yaml_serde

[xeniape]

Description

Part of stackabletech/issues#898

Integrationtests

--- PASS: kuttl (614.30s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/cluster-operation_zookeeper-latest-3.9.6_openshift-false (72.37s)
        --- PASS: kuttl/harness/smoke_zookeeper-3.9.6_use-server-tls-true_use-client-auth-tls-false_openshift-false (120.63s)
        --- PASS: kuttl/harness/smoke_zookeeper-3.9.6_use-server-tls-false_use-client-auth-tls-true_openshift-false (101.92s)
        --- PASS: kuttl/harness/smoke_zookeeper-3.9.6_use-server-tls-false_use-client-auth-tls-false_openshift-false (79.15s)
        --- PASS: kuttl/harness/smoke_zookeeper-3.9.5_use-server-tls-true_use-client-auth-tls-true_openshift-false (105.47s)
        --- PASS: kuttl/harness/smoke_zookeeper-3.9.5_use-server-tls-true_use-client-auth-tls-false_openshift-false (88.26s)
        --- PASS: kuttl/harness/smoke_zookeeper-3.9.5_use-server-tls-false_use-client-auth-tls-false_openshift-false (72.99s)
        --- PASS: kuttl/harness/smoke_zookeeper-3.9.5_use-server-tls-false_use-client-auth-tls-true_openshift-false (94.79s)
        --- PASS: kuttl/harness/delete-rolegroup_zookeeper-3.9.5_openshift-false (54.30s)
        --- PASS: kuttl/harness/delete-rolegroup_zookeeper-3.9.6_openshift-false (87.89s)
        --- PASS: kuttl/harness/logging_zookeeper-3.9.6_openshift-false (68.37s)
        --- PASS: kuttl/harness/logging_zookeeper-3.9.5_openshift-false (70.27s)
        --- PASS: kuttl/harness/znode_zookeeper-latest-3.9.6_openshift-false (28.95s)
        --- PASS: kuttl/harness/smoke_zookeeper-3.9.6_use-server-tls-true_use-client-auth-tls-true_openshift-false (95.10s)
PASS

Unittests

test result: ok. 62 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s

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]

LGTM otherwise