Suhas Athani has uploaded this change for review.

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gRPC: Add gRPC clientstats APIs for layouts, delegations, IOops, allops, and 9P

- Extend `cltmgrService.ClientStats` with the remaining
  `org.ganesha.nfsd.clientstats` D-Bus methods beyond
  per-version I/O:
  GetNFSv41Layouts
  GetNFSv42Layouts
  GetDelegations
  GetClientIOops
  GetClientAllops
  Get9pIO
  Get9pTrans
  Get9pOpStats
- Add shared protobuf types in `nfsProtoUtil.proto` and
  C/C++ bridge structs in `server_stats_grpc.h`, with
  extraction in `server_stats.c` and client lookup /
  orchestration in `client_mgr.c`.
- Wire handlers in `nfsServiceServer.cc` using the
  existing `ClientStatsService` registration; errors
  stay in `StatusResponse` with transport `OK`, matching
  D-Bus semantics.

Change-Id: I491ede619ba6c0da03476f66c0d919b89f4e951b
Signed-off-by: Suhas Athani <Suhas.Athani@ibm.com>
---
M src/grpc_server/nfsService.h
M src/grpc_server/nfsServiceServer.cc
M src/grpc_server/proto/cltmgrService.proto
M src/grpc_server/proto/nfsProtoUtil.proto
M src/include/server_stats_grpc.h
M src/support/client_mgr.c
M src/support/server_stats.c
7 files changed, 1,631 insertions(+), 1 deletion(-)

git pull ssh://review.gerrithub.io:29418/ffilz/nfs-ganesha refs/changes/49/1242549/1

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