[API] Update supported params for ingest API endpoints

Author: estolfo

elasticsearch-api/lib/elasticsearch/api/actions/ingest/processor_grok.rb

@@ -0,0 +1,29 @@
+module Elasticsearch
+  module API
+    module Ingest
+      module Actions
+
+        # Extracts structured fields out of a single text field within a document. You choose which field to extract
+        #   matched fields from, as well as the grok pattern you expect will match.
+        #
+        #
+        # @see https://www.elastic.co/guide/en/elasticsearch/plugins/current/ingest.html
+        #
+        def processor_grok(arguments={})
+          method = Elasticsearch::API::HTTP_GET
+          path   = "_ingest/processor/grok"
+          params = {}
+          body   = nil
+
+          perform_request(method, path, params, body).body
+        end
+
+        # Register this action with its valid params when the module is loaded.
+        #
+        # @since 6.2.0
+        ParamsRegistry.register(:processor_grok, [
+        ].freeze)
+      end
+    end
+  end
+end