chore: add oci references, merge templating changes

[xeniape]

Description

• merge templating PR
• change all references, use search-and-replace to find things (Makefile, Dockerfiles, operator Helm Charts, default,nix, kuttl tests, ....)
• ensure that kuttl tests are running
• for every image reference, ensure that the image is actually in Harbor (and image hash is the same as before?)

Openshift tests:

--- PASS: kuttl (1553.16s)
    --- PASS: kuttl/harness (0.00s)
        --- PASS: kuttl/harness/iceberg_openshift-true_spark-3.5.2 (100.80s)
        --- PASS: kuttl/harness/spark-pi-private-s3_openshift-true_spark-3.5.2 (130.33s)
        --- PASS: kuttl/harness/pyspark-ny-public-s3_openshift-true_spark-3.5.2 (156.33s)
        --- PASS: kuttl/harness/spark-history-server_openshift-true_spark-3.5.2_s3-use-tls-true (289.27s)
        --- PASS: kuttl/harness/smoke_openshift-true_spark-3.5.2_s3-use-tls-true (221.13s)
        --- PASS: kuttl/harness/custom-log-directory_openshift-true_spark-3.5.2_hdfs-latest-3.4.0_zookeeper-latest-3.9.2 (218.58s)
        --- PASS: kuttl/harness/spark-pi-public-s3_openshift-true_spark-3.5.2 (119.55s)
        --- PASS: kuttl/harness/spark-ny-public-s3_openshift-true_spark-3.5.2_s3-use-tls-true (173.52s)
        --- PASS: kuttl/harness/overrides_openshift-true_spark-3.5.2 (163.46s)
        --- PASS: kuttl/harness/logging_openshift-true_spark-3.5.2_ny-tlc-report-0.2.0 (455.22s)
        --- PASS: kuttl/harness/hbase-connector_openshift-true_spark-3.5.2_hbase-2.4.18_hdfs-latest-3.4.0_zookeeper-latest-3.9.2 (239.33s)
        --- PASS: kuttl/harness/pyspark-ny-public-s3-image_openshift-true_spark-3.5.2_ny-tlc-report-0.2.0 (154.32s)
        --- PASS: kuttl/harness/resources_openshift-true_spark-3.5.2 (99.81s)
        --- PASS: kuttl/harness/spark-examples_openshift-true_spark-3.5.2 (77.86s)
        --- PASS: kuttl/harness/delta-lake_openshift-true_spark-delta-lake-3.5.2_delta-3.1.0 (258.92s)
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

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1. Changes are OpenShift compatible
2. Helm chart can be installed and deployed operator works
3. Integration tests passed (for non trivial changes)
4. Changes need to be "offline" compatible

Reviewer

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1. (Integration-)Test cases ran successfully
2. Changelog updated
3. Cargo.toml only contains references to git tags (not specific commits or branches)

Acceptance

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1. Feature Tracker has been updated
2. Proper release label has been added
3. Roadmap has been updated