Incorporate changes to SearchPipelinePlugin interface

Description:
============
SearchPipelinePlugin interface now uses Processor.Factory<SearchResponseProcessor> instead of Processor.Factory.
Also use getResponseProcessors method instead of getProcessors method.

Check list:
===========
- [x] New functionality includes testing.
  - [x] All tests pass
- [x] New functionality has been documented.
  - [x] New functionality has javadoc added
- [x] Commits are signed as per the DCO using --signoff

Signed-off-by: Ketan Kulkarni <[email protected]>

src/main/java/org/opensearch/search/relevance/SearchRelevancePlugin.java

@@ -31,6 +31,7 @@
 import org.opensearch.repositories.RepositoriesService;
 import org.opensearch.script.ScriptService;
 import org.opensearch.search.pipeline.Processor;
+import org.opensearch.search.pipeline.SearchResponseProcessor;
 import org.opensearch.search.relevance.actionfilter.SearchActionFilter;
 import org.opensearch.search.relevance.client.OpenSearchClient;
 import org.opensearch.search.relevance.configuration.ResultTransformerConfigurationFactory;
@@ -114,7 +115,7 @@ public List<SearchExtSpec<?>> getSearchExts() {
   }
 
   @Override
-  public Map<String, Processor.Factory> getProcessors(Processor.Parameters parameters) {
+  public Map<String, Processor.Factory<SearchResponseProcessor>> getResponseProcessors(Processor.Parameters parameters) {
     return Map.of(PersonalizeRankingResponseProcessor.TYPE,
             new PersonalizeRankingResponseProcessor.Factory(
                     PersonalizeClientSettings.getClientSettings(parameters.env.settings())));

src/main/java/org/opensearch/search/relevance/transformer/personalizeintelligentranking/PersonalizeRankingResponseProcessor.java

@@ -135,7 +135,7 @@ public String getDescription() {
         return description;
     }
 
-    public static final class Factory implements Processor.Factory {
+    public static final class Factory implements Processor.Factory<SearchResponseProcessor> {
 
         PersonalizeClientSettings personalizeClientSettings;
 
@@ -144,7 +144,7 @@ public Factory(PersonalizeClientSettings settings) {
         }
 
         @Override
-        public PersonalizeRankingResponseProcessor create(Map<String, Processor.Factory> processorFactories, String tag, String description, Map<String, Object> config) throws Exception {
+        public PersonalizeRankingResponseProcessor create(Map<String, Processor.Factory<SearchResponseProcessor>> processorFactories, String tag, String description, Map<String, Object> config) throws Exception {
             // TODO: Handle validation as well as required vs non required config differentiation with related user error / exception
             String personalizeCampaign = ConfigurationUtils.readStringProperty(TYPE, tag, config, CAMPAIGN_ARN_CONFIG_NAME);
             String iamRoleArn = ConfigurationUtils.readOptionalStringProperty(TYPE, tag, config, IAM_ROLE_ARN_CONFIG_NAME);