refactor(proto): move PersistService to new file

Separate the PersistService into it's own file.

generated_types/build.rs

@@ -59,6 +59,7 @@ fn generate_grpc_types(root: &Path) -> Result<()> {
         ingester_path.join("write_info.proto"),
         ingester_path.join("write.proto"),
         ingester_path.join("replication.proto"),
+        ingester_path.join("persist.proto"),
         namespace_path.join("service.proto"),
         object_store_path.join("service.proto"),
         predicate_path.join("predicate.proto"),

generated_types/protos/influxdata/iox/ingester/v1/persist.proto

@@ -0,0 +1,14 @@
+syntax = "proto3";
+package influxdata.iox.ingester.v1;
+option go_package = "github.com/influxdata/iox/ingester/v1";
+
+service PersistService {
+  rpc Persist(PersistRequest) returns (PersistResponse);
+}
+
+message PersistRequest {
+  // The namespace to persist
+  string namespace = 1;
+}
+
+message PersistResponse {}

generated_types/protos/influxdata/iox/ingester/v1/write.proto

@@ -14,13 +14,3 @@ message WriteRequest {
 
 message WriteResponse {}
 
-service PersistService {
-  rpc Persist(PersistRequest) returns (PersistResponse);
-}
-
-message PersistRequest {
-  // The namespace to persist
-  string namespace = 1;
-}
-
-message PersistResponse {}