Bump apache-httpclient5.version to 5.6.2, apache-httpcore5.version to 5.4.3

[thll]

• Uses the latest available versions for the apache-httpclient5.version and apache-httpcore5.version properties.
• Adds management for org.apache.httpcomponents.core5:httpcore5 and org.apache.httpcomponents.core5:httpcore5-h2 dependencies.
• Disables transparent content compression on the http client used by the OpenSearch client which causes issues while we are on opensearch-java < 3.6.0.

/prd https://github.com/Graylog2/graylog-plugin-enterprise/pull/14787
/nocl

[thll]

Currently blocked by a pending update of our opensearch-java dependency, which we'd need to bump to at least 3.6.0 to have opensearch-project/opensearch-java#1851 included.

[thll]

If we decide not to update opensearch-java, we can add

            httpClientBuilder.disableContentCompression();

As a workaround to org.graylog.storage.opensearch3.OfficialOpensearchClientProvider#buildTransport. But with that workaround in place, we would have to make sure that we remove it again, once we update opensearch-java.

[thll]

I've decided to move forward with this independently from an update of opensearch-java. For that, I've disabled content compression on the client level and added a trip-wire test that will fail when opensearch-java is updated but the workaround left in place.