DeleteEntry Processor support for parsing json object

[dinujoh]

Is your feature request related to a problem? Please describe.
The DeleteEntry processor uses GenericExpressionEvaluator and it doesn't support deleting key with DeleteEntry processor when the expression path refers to json object.

log-pipeline:
  source:
    http:
      path: "/test/path"
  processor:
    - delete_entries:
        with_keys: [ "responseElements" ]
        delete_when: '/responseElements == null'
    - date:
        from_time_received: true
        destination: "@timestamp"
  sink:
    - stdout:

 curl -X POST http://localhost:2021/test/path -H 'Content-Type: application/json; charset=utf-8' -d '[{"log":"sample log", "responseElements": {"a":"a", "b": "b" }}]'

2023-08-07T11:10:58,081 [log-pipeline-processor-worker-1-thread-1] ERROR org.opensearch.dataprepper.pipeline.ProcessWorker - Encountered exception during pipeline log-pipeline processing
org.opensearch.dataprepper.expression.ExpressionEvaluationException: Unable to evaluate statement "/responseElements == null"
        at org.opensearch.dataprepper.expression.GenericExpressionEvaluator.evaluate(GenericExpressionEvaluator.java:41) ~[data-prepper-expression-2.3.2.jar:?]
        at org.opensearch.dataprepper.expression.ExpressionEvaluator.evaluateConditional(ExpressionEvaluator.java:28) ~[data-prepper-api-2.3.2.jar:?]
        at org.opensearch.dataprepper.plugins.processor.mutateevent.DeleteEntryProcessor.doExecute(DeleteEntryProcessor.java:40) ~[mutate-event-processors-2.3.2.jar:?]
        at org.opensearch.dataprepper.model.processor.AbstractProcessor.lambda$execute$0(AbstractProcessor.java:54) ~[data-prepper-api-2.3.2.jar:?]
        at io.micrometer.core.instrument.composite.CompositeTimer.record(CompositeTimer.java:69) ~[micrometer-core-1.10.5.jar:1.10.5]
        at org.opensearch.dataprepper.model.processor.AbstractProcessor.execute(AbstractProcessor.java:54) ~[data-prepper-api-2.3.2.jar:?]
        at org.opensearch.dataprepper.pipeline.ProcessWorker.doRun(ProcessWorker.java:115) ~[data-prepper-core-2.3.2.jar:?]
        at org.opensearch.dataprepper.pipeline.ProcessWorker.run(ProcessWorker.java:50) [data-prepper-core-2.3.2.jar:?]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515) [?:?]
        at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) [?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) [?:?]
        at java.lang.Thread.run(Thread.java:832) [?:?]

Describe the solution you'd like
Add support for parsing Json object in LiteralTypeConversionsConfiguration that is used by GenericExpressionEvaluator.