feat: [TextToSpeech] add Gemini TTS Multispeaker API fields (#8615)

* feat: add Gemini TTS Multispeaker API fields

PiperOrigin-RevId: 809186275

Source-Link: googleapis/googleapis@b2cd70b

Source-Link: googleapis/googleapis-gen@cbd7c4e
Copy-Tag: eyJwIjoiVGV4dFRvU3BlZWNoLy5Pd2xCb3QueWFtbCIsImgiOiJjYmQ3YzRlYzUxZDBhZGFjNzI3ODdhYjc0Y2U0MDc4ZTdmMjdhODdhIn0=

* 🦉 Updates from OwlBot post-processor

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---------

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

Author: gcf-owl-bot[bot]

TextToSpeech/metadata/V1/CloudTts.php

@@ -80,9 +80,7 @@ final class TextToSpeechClient
     private const CODEGEN_NAME = 'gapic';
 
     /** The default scopes required by the service. */
-    public static $serviceScopes = [
-        'https://www.googleapis.com/auth/cloud-platform',
-    ];
+    public static $serviceScopes = ['https://www.googleapis.com/auth/cloud-platform'];
 
     private static function getClientDefaults()
     {
@@ -301,8 +299,10 @@ public function streamingSynthesize(array $callOptions = []): BidiStream
      *
      * @throws ApiException Thrown if the API call fails.
      */
-    public function synthesizeSpeech(SynthesizeSpeechRequest $request, array $callOptions = []): SynthesizeSpeechResponse
-    {
+    public function synthesizeSpeech(
+        SynthesizeSpeechRequest $request,
+        array $callOptions = []
+    ): SynthesizeSpeechResponse {
         return $this->startApiCall('SynthesizeSpeech', $request, $callOptions)->wait();
     }
 }

TextToSpeech/src/V1/Client/TextToSpeechClient.php

@@ -79,9 +79,7 @@ final class TextToSpeechLongAudioSynthesizeClient
     private const CODEGEN_NAME = 'gapic';
 
     /** The default scopes required by the service. */
-    public static $serviceScopes = [
-        'https://www.googleapis.com/auth/cloud-platform',
-    ];
+    public static $serviceScopes = ['https://www.googleapis.com/auth/cloud-platform'];
 
     private $operationsClient;
 
@@ -91,14 +89,16 @@ private static function getClientDefaults()
             'serviceName' => self::SERVICE_NAME,
             'apiEndpoint' => self::SERVICE_ADDRESS . ':' . self::DEFAULT_SERVICE_PORT,
             'clientConfig' => __DIR__ . '/../resources/text_to_speech_long_audio_synthesize_client_config.json',
-            'descriptorsConfigPath' => __DIR__ . '/../resources/text_to_speech_long_audio_synthesize_descriptor_config.php',
+            'descriptorsConfigPath' =>
+                __DIR__ . '/../resources/text_to_speech_long_audio_synthesize_descriptor_config.php',
             'gcpApiConfigPath' => __DIR__ . '/../resources/text_to_speech_long_audio_synthesize_grpc_config.json',
             'credentialsConfig' => [
                 'defaultScopes' => self::$serviceScopes,
             ],
             'transportConfig' => [
                 'rest' => [
-                    'restClientConfigPath' => __DIR__ . '/../resources/text_to_speech_long_audio_synthesize_rest_client_config.php',
+                    'restClientConfigPath' =>
+                        __DIR__ . '/../resources/text_to_speech_long_audio_synthesize_rest_client_config.php',
                 ],
             ],
         ];