feat: [Support] A new service SupportEventSubscription is added (#9305)

* feat: A new service `SupportEventSubscription` is added
docs: A comment for field `query` in message `.google.cloud.support.v2.SearchCasesRequest` is changed

PiperOrigin-RevId: 940079932

Source-Link: googleapis/googleapis@2bb679d

Source-Link: googleapis/googleapis-gen@520a96a
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* feat: A new service `SupportEventSubscription` is added
docs: A comment for field `query` in message `.google.cloud.support.v2.SearchCasesRequest` is changed

PiperOrigin-RevId: 940080026

Source-Link: googleapis/googleapis@03756fd

Source-Link: googleapis/googleapis-gen@5721e15
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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Brent Shaffer <betterbrent@google.com>

Author: gcf-owl-bot[bot]

Support/metadata/V2/SupportEventSubscription.php

@@ -0,0 +1,80 @@
+<?php
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * GENERATED CODE WARNING
+ * This file was automatically generated - do not edit!
+ */
+
+require_once __DIR__ . '/../../../vendor/autoload.php';
+
+// [START cloudsupport_v2_generated_SupportEventSubscriptionService_CreateSupportEventSubscription_sync]
+use Google\ApiCore\ApiException;
+use Google\Cloud\Support\V2\Client\SupportEventSubscriptionServiceClient;
+use Google\Cloud\Support\V2\CreateSupportEventSubscriptionRequest;
+use Google\Cloud\Support\V2\SupportEventSubscription;
+
+/**
+ * Creates a support event subscription for an organization.
+ *
+ * @param string $formattedParent                     The parent resource name where the support event subscription
+ *                                                    will be created. Format: organizations/{organization_id}
+ *                                                    Please see {@see SupportEventSubscriptionServiceClient::organizationName()} for help formatting this field.
+ * @param string $supportEventSubscriptionPubSubTopic The name of the Pub/Sub topic to publish notifications to.
+ *                                                    Format: projects/{project}/topics/{topic}
+ */
+function create_support_event_subscription_sample(
+    string $formattedParent,
+    string $supportEventSubscriptionPubSubTopic
+): void {
+    // Create a client.
+    $supportEventSubscriptionServiceClient = new SupportEventSubscriptionServiceClient();
+
+    // Prepare the request message.
+    $supportEventSubscription = (new SupportEventSubscription())
+        ->setPubSubTopic($supportEventSubscriptionPubSubTopic);
+    $request = (new CreateSupportEventSubscriptionRequest())
+        ->setParent($formattedParent)
+        ->setSupportEventSubscription($supportEventSubscription);
+
+    // Call the API and handle any network failures.
+    try {
+        /** @var SupportEventSubscription $response */
+        $response = $supportEventSubscriptionServiceClient->createSupportEventSubscription($request);
+        printf('Response data: %s' . PHP_EOL, $response->serializeToJsonString());
+    } catch (ApiException $ex) {
+        printf('Call failed with message: %s' . PHP_EOL, $ex->getMessage());
+    }
+}
+
+/**
+ * Helper to execute the sample.
+ *
+ * This sample has been automatically generated and should be regarded as a code
+ * template only. It will require modifications to work:
+ *  - It may require correct/in-range values for request initialization.
+ *  - It may require specifying regional endpoints when creating the service client,
+ *    please see the apiEndpoint client configuration option for more details.
+ */
+function callSample(): void
+{
+    $formattedParent = SupportEventSubscriptionServiceClient::organizationName('[ORGANIZATION]');
+    $supportEventSubscriptionPubSubTopic = '[PUB_SUB_TOPIC]';
+
+    create_support_event_subscription_sample($formattedParent, $supportEventSubscriptionPubSubTopic);
+}
+// [END cloudsupport_v2_generated_SupportEventSubscriptionService_CreateSupportEventSubscription_sync]