ci: [java] automatic kokoro label in and /gcbrun comment (#1965)

Source-Link: googleapis/synthtool@bd2bae8
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-java:latest@sha256:72f0d373307d128b2cb720c5cb4d90b31f0e86529dd138c632710ae0c69efae3

.github/.OwlBot.lock.yaml

@@ -1,4 +1,4 @@
-# Copyright 2023 Google LLC
+# Copyright 2024 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-java:latest
-  digest: sha256:3a95f1b9b1102865ca551b76be51d2bdb850900c4db2f6d79269e7af81ac8f84
-# created: 2023-07-27T18:37:44.251188775Z
+  digest: sha256:72f0d373307d128b2cb720c5cb4d90b31f0e86529dd138c632710ae0c69efae3
+# created: 2024-06-05T18:32:21.724930324Z

.github/trusted-contribution.yml

@@ -1,3 +1,9 @@
 trustedContributors:
 - renovate-bot
 - gcf-owl-bot[bot]
+
+annotations:
+- type: comment
+  text: "/gcbrun"
+- type: label
+  text: "kokoro:force-run"