* Refactor data-node download and assembly
- Download OpenSearch aarch64 distribution in addition to x64
- Extract OpenSearch distribution into "target/opensearch/*" instead of
"bin/download".
- Include OpenSearch distributions in "dist/" instead of "bin/" in
assembly
* Fix data-node test container creation
* Adjust OpenSearch location for architecture dependent locations
* If the configured location exists, use it
Otherwise, check for architecture dependent distribution directories.
* Switch default config file to locations that work with the tarball
* Rename datanode.jar to graylog-datanode.jar
* Rename datanodectl to graylog-datanode.sh
* Include graylog-datanode.sh in assembly as bin/graylog-datanode
* Add a jvm.options config file
* Add a production log4j2.xml config file
* Use bundled JVM if it exists
* fixed docker image for datanode integration tests
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Co-authored-by: Tomas Dvorak <tomas.dvorak@graylog.com>
