Add CreatePit protobuf generation support

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

Author: lucy66hw

CHANGELOG.md

@@ -5,6 +5,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ## [Unreleased]
 ### Added
 - 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)).
 
 ### Changed
 

tools/proto-convert/src/config/spec-filter.yaml

@@ -4,6 +4,7 @@ x-operation-groups:
   - search
   - ml.predict_model_stream
   - ml.execute_agent_stream
+  - create_pit
 
 # Schemas to exclude from proto generation
 # These schemas and their nested dependencies will not be included