[Type removal] Remove redundant _type in pipeline simulate action (#3371)

Signed-off-by: Suraj Singh <surajrider@gmail.com>

client/rest-high-level/src/test/java/org/opensearch/client/IngestRequestConvertersTests.java

@@ -121,7 +121,6 @@ public class IngestRequestConvertersTests extends OpenSearchTestCase {
             + "  \"docs\": ["
             + "    {"
             + "      \"_index\": \"index\","
-            + "      \"_type\": \"_doc\","
             + "      \"_id\": \"id\","
             + "      \"_source\": {"
             + "        \"foo\": \"rab\""

modules/ingest-common/src/yamlRestTest/resources/rest-api-spec/test/ingest/120_grok.yml

@@ -134,7 +134,6 @@ teardown:
             "docs": [
               {
                 "_index": "index",
-                "_type": "type",
                 "_id": "id",
                 "_source": {
                   "field": "abc2xyz"

server/src/internalClusterTest/java/org/opensearch/ingest/IngestClientIT.java

@@ -111,7 +111,6 @@ public class IngestClientIT extends OpenSearchIntegTestCase {
                 .startArray("docs")
                 .startObject()
                 .field("_index", "index")
-                .field("_type", "type")
                 .field("_id", "id")
                 .startObject("_source")
                 .field("foo", "bar")