Timeout on buildkite artifact upload but do not fail the build

this workarounds an issue we currently see on windows ci boxes
where we run into timeouts in this step in our builds

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/ElasticsearchBuildCompletePlugin.java

@@ -163,7 +163,13 @@ public void execute(BuildFinishedFlowAction.Parameters parameters) throws FileNo
                     // So, if you change this such that the artifact will have a slash/directory in it, you'll need to update the logic
                     // below as well
                     pb.directory(uploadFileDir);
-                    pb.start().waitFor();
+                    try {
+                        // we are very generious here, as the upload can take
+                        // a long time depending on its size
+                        pb.start().waitFor(30, java.util.concurrent.TimeUnit.MINUTES);
+                    } catch (InterruptedException e) {
+                        System.out.println("Failed to upload buildkite artifact " + e.getMessage());
+                    }
 
                     System.out.println("Generating buildscan link for artifact...");