Fix opensearch sink

[oeyh]

Description

After updating opensearch-java to 2.20 in #5426, we start to see this error in opensearch sink when writing to AWS OpenSearch domain:

org.opensearch.dataprepper.core.pipeline.common.FutureHelper - FutureTask failed due to: 
java.util.concurrent.ExecutionException: java.lang.NoSuchMethodError: 'software.amazon.awssdk.http.ContentStreamProvider software.amazon.awssdk.http.ContentStreamProvider.fromByteArrayUnsafe(byte[])'
...
Caused by: java.lang.NoSuchMethodError: 'software.amazon.awssdk.http.ContentStreamProvider software.amazon.awssdk.http.ContentStreamProvider.fromByteArrayUnsafe(byte[])'
	at org.opensearch.client.transport.aws.AwsSdk2Transport.prepareRequest(AwsSdk2Transport.java:347) ~[opensearch-java-2.20.0.jar:?]
	at org.opensearch.client.transport.aws.AwsSdk2Transport.performRequest(AwsSdk2Transport.java:214) ~[opensearch-java-2.20.0.jar:?]
	at org.opensearch.client.opensearch.OpenSearchClient.bulk(OpenSearchClient.java:224) ~[opensearch-java-2.20.0.jar:?]
	at org.opensearch.dataprepper.plugins.sink.opensearch.bulk.OpenSearchDefaultBulkApiWrapper.bulk(OpenSearchDefaultBulkApiWrapper.java:19) ~[opensearch-2.x.451.jar:?]

The SDK version we use currently, 2.25.11, doesn't support the method mentioned in the error message.
This PR updates SDK to latest version. I was able to reproduce the error and confirm the fix locally.

Issues Resolved

N/A

Check List

• New functionality includes testing.
• New functionality has a documentation issue. Please link to it in this PR.
  • New functionality has javadoc added
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