Revert "Replace opensearch class names with opendistro class names during serialization and restore them back during deserialization (#1278)"

[cliu123]

Description

This PR being reverted is one of the things that would be broken by JDK17. JDK17 support got postponed to 2.0 because we'd like to keep the commits like this one being reverted to support rolling upgrade from ODFE/ES versions to OpenSearch 1.x. But in 2.0, we can revert them to unblock JDK17 since we won't need to support rolling upgrade directly from ODFE/ES versions to OpenSearch 2.0. The upgrade path ODFE -> OpenSearch 1.x -> OpenSearch 2.0 will still be retained.

This reverts commit 4abbafc.

Signed-off-by: cliu123 [email protected]

Issues Resolved

#1653

Testing

UT

Check List

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[peternied]

@cliu123 Could you add a little detail for why we are reverting this change? At first glance, it seems like we are loosing a level of backward compatibility

[cliu123]

@cliu123 Could you add a little detail for why we are reverting this change? At first glance, it seems like we are loosing a level of backward compatibility

Sure. This PR being reverted is one of the things that would be broken by JDK17. JDK17 support got postponed to 2.0 because we'd like to keep the commits like this one being reverted to support rolling upgrade from ODFE/ES versions to OpenSearch 1.x. But in 2.0, we can revert them to unblock JDK17 since we won't need to support rolling upgrade directly from ODFE/ES versions to OpenSearch 2.0. The upgrade path ODFE -> OpenSearch 1.x -> OpenSearch 2.0 will still be retained.

[peternied]

Thanks for the details, I'm going to update the description of this PR to include those details and tag it 2.0.0