Add PIT RPCs to SearchService (opensearch-project#469)

* Add PIT RPCs to SearchService

Signed-off-by: xil <fridalu66@gmail.com>

* Update changelog for PR opensearch-project#469

Signed-off-by: xil <fridalu66@gmail.com>

---------

Signed-off-by: xil <fridalu66@gmail.com>

Author: lucy66hw

CHANGELOG.md

@@ -7,6 +7,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Add support for double, int and long in BinaryFieldValue ([#460](https://github.com/opensearch-project/opensearch-protobufs/pull/460))
 - Add Create PIT support to protobuf generation ([#466](https://github.com/opensearch-project/opensearch-protobufs/pull/466)).
 - Add Delete PIT support to protobuf generation ([#468](https://github.com/opensearch-project/opensearch-protobufs/pull/468)).
+- Add PIT RPCs to `SearchService` ([#469](https://github.com/opensearch-project/opensearch-protobufs/pull/469)).
 
 ### Changed
 

protos/services/search_service.proto

@@ -22,6 +22,10 @@ import "protos/schemas/common.proto";
 service SearchService {
   rpc Search(SearchRequest) returns (SearchResponse) {}
 
+  rpc CreatePit(CreatePitRequest) returns (CreatePITResponse) {}
+
+  rpc DeletePit(DeletePitRequest) returns (DeletePITResponse) {}
+
   // Server side grpc stream endpoint
   rpc ServerStreamSearch(SearchRequest) returns (stream SearchResponse) {}
 }