[VOL-5583] upgrade go to 1.25.5 and golangci-lint version to 2.8.0

Change-Id: I5c8fd1391463f185c912e1983cd378d4c96b7bd6
Signed-off-by: madhumatigouda <madhumati.gouda@radisys.com>
diff --git a/go/openolt/openolt_grpc.pb.go b/go/openolt/openolt_grpc.pb.go
index c19691d..e036d88 100644
--- a/go/openolt/openolt_grpc.pb.go
+++ b/go/openolt/openolt_grpc.pb.go
@@ -14,7 +14,7 @@
 
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.6.0
+// - protoc-gen-go-grpc v1.6.1
 // - protoc             v4.25.8
 // source: voltha_protos/openolt.proto