[rust-node-addon] add rust function and binding type for privilegedDe…

…leteUsers

Summary:
we'll call this RPC from a keyserver script, so we need rust bindings

Depends on D13630

Test Plan:
created two test users on staging. manually added a token for user ID 256 to staging. then called privileged_delete_users from keyserver.js to delete the two test users. confirmed their data was removed from ddb

```
diff --git a/keyserver/src/keyserver.js b/keyserver/src/keyserver.js
index 88dcd0b4a2..950680086d 100644
--- a/keyserver/src/keyserver.js
+++ b/keyserver/src/keyserver.js
@@ -11,6 +11,7 @@ import type { $Request, $Response } from 'express';
 import expressWs from 'express-ws';
 import os from 'os';
 import qrcode from 'qrcode';
+import { getRustAPI } from 'rust-node-addon';
 import stoppable from 'stoppable';

 import './cron/cron.js';
@@ -76,6 +77,13 @@ void (async () => {
     initFCCache(),
   ]);

+  const rustAPI = await getRustAPI();
+  const response = await rustAPI.privilegedDeleteUsers('256', 'asdf', '1234', [
+    'C4E8C417-DD67-4084-8282-4A788DF38F57',
+    '78941137-03DB-4A23-A17F-890A94948493',
+  ]);
+  console.log(response);
+
```

Reviewers: bartek, will

Reviewed By: bartek

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D13631

keyserver/addons/rust-node-addon/rust-binding-types.js

@@ -83,6 +83,12 @@ type RustNativeBindingAPI = {
     authAccessToken: string,
     userIds: $ReadOnlyArray<string>,
   ) => Promise<UserIdentitiesResponse>,
+  +privilegedDeleteUsers: (
+    authUserId: string,
+    authDeviceId: string,
+    authAccessToken: string,
+    userIds: $ReadOnlyArray<string>,
+  ) => Promise<void>,
 };
 
 export type { RustNativeBindingAPI };

keyserver/addons/rust-node-addon/src/identity_client/mod.rs

@@ -6,6 +6,7 @@ pub mod get_inbound_keys_for_user;
 pub mod login;
 pub mod nonce;
 pub mod prekey;
+mod privileged_delete_users;
 pub mod register_user;
 pub mod remove_reserved_usernames;
 pub mod upload_one_time_keys;
@@ -20,7 +21,7 @@ use config::get_identity_service_config;
 use generated::CODE_VERSION;
 use grpc_clients::identity::authenticated::ChainedInterceptedAuthClient;
 use grpc_clients::identity::protos::authenticated::{
-  InboundKeyInfo, UploadOneTimeKeysRequest,
+  InboundKeyInfo, PrivilegedDeleteUsersRequest, UploadOneTimeKeysRequest,
 };
 use grpc_clients::identity::protos::unauthenticated as client_proto;
 use grpc_clients::identity::shared::CodeVersionLayer;

keyserver/addons/rust-node-addon/src/identity_client/privileged_delete_users.rs

@@ -0,0 +1,27 @@
+use super::*;
+
+#[napi]
+#[instrument(skip_all)]
+pub async fn privileged_delete_users(
+  auth_user_id: String,
+  auth_device_id: String,
+  auth_access_token: String,
+  user_ids: Vec<String>,
+) -> Result<()> {
+  let mut identity_client = get_authenticated_identity_client(
+    auth_user_id,
+    auth_device_id,
+    auth_access_token,
+  )
+  .await?;
+
+  let privileged_delete_users_request =
+    PrivilegedDeleteUsersRequest { user_ids };
+
+  identity_client
+    .privileged_delete_users(privileged_delete_users_request)
+    .await
+    .map_err(handle_grpc_error)?;
+
+  Ok(())
+}