[BUG] Parquet Codec requires path_prefix

[engechas]

Describe the bug
DataPrepper throws an exception on start up if path_prefix is not defined under the parquet codec.

Caused by: org.opensearch.dataprepper.model.plugin.InvalidPluginConfigurationException: Plugin parquet in pipeline null is configured incorrectly: pathPrefix must not be null
	at org.opensearch.dataprepper.plugin.PluginConfigurationConverter.convert(PluginConfigurationConverter.java:73) ~[data-prepper-core-2.4.0-SNAPSHOT.jar:?]
	at org.opensearch.dataprepper.plugin.DefaultPluginFactory.getConstructionContext(DefaultPluginFactory.java:115) ~[data-prepper-core-2.4.0-SNAPSHOT.jar:?]
	at org.opensearch.dataprepper.plugin.DefaultPluginFactory.loadPlugin(DefaultPluginFactory.java:74) ~[data-prepper-core-2.4.0-SNAPSHOT.jar:?]
	at org.opensearch.dataprepper.plugins.sink.s3.S3Sink.<init>(S3Sink.java:63) ~[s3-sink-2.4.0-SNAPSHOT.jar:?]
	... 41 more

The S3 sink configuration has path_prefix defined under the object_key_options object. I think the correct behavior would be to remove path_prefix from the parquet codec configuration

To Reproduce
Create an S3 sink pipeline using the parquet codec without path_prefix defined in the codec config

Example S3 sink config

sink:
    - s3:
        aws:
          region: "us-west-2"
          sts_role_arn: "<my role>"
        bucket: "my-sink-bucket"
        object_key:
          path_prefix: "perf-sink"
        threshold:
          event_collect_timeout: 600s
          maximum_size: 128mb
        codec:
          parquet:
            schema: ...

Expected behavior
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Environment (please complete the following information):

• OS: [e.g. Ubuntu 20.04 LTS]
• Version [e.g. 22]

Additional context
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