fix: Make retry policy back off more aggressively for RPCs that retry…

… RESOURCE_EXHAUSTD

PiperOrigin-RevId: 557935020

Source-Link: googleapis/googleapis@38e1f31

Source-Link: googleapis/googleapis-gen@5bbe39d
Copy-Tag: eyJwIjoiYXBpcy9Hb29nbGUuQ2xvdWQuUHViU3ViLlYxLy5Pd2xCb3QueWFtbCIsImgiOiI1YmJlMzlkMzcyMThhNDIwYjIzNjhjMzc1NDFkZTU4ODdkYjdkNmFmIn0=

apis/Google.Cloud.PubSub.V1/Google.Cloud.PubSub.V1/PublisherServiceApiClient.g.cs

@@ -106,7 +106,7 @@ private PublisherServiceApiSettings(PublisherServiceApiSettings existing) : base
         /// <remarks>
         /// <list type="bullet">
         /// <item><description>Initial retry delay: 100 milliseconds.</description></item>
-        /// <item><description>Retry delay multiplier: 1.3</description></item>
+        /// <item><description>Retry delay multiplier: 4</description></item>
         /// <item><description>Retry maximum delay: 60000 milliseconds.</description></item>
         /// <item><description>Maximum attempts: 5</description></item>
         /// <item>
@@ -120,7 +120,7 @@ private PublisherServiceApiSettings(PublisherServiceApiSettings existing) : base
         /// <item><description>Timeout: 60 seconds.</description></item>
         /// </list>
         /// </remarks>
-        public gaxgrpc::CallSettings PublishSettings { get; set; } = gaxgrpc::CallSettingsExtensions.WithRetry(gaxgrpc::CallSettings.FromExpiration(gax::Expiration.FromTimeout(sys::TimeSpan.FromMilliseconds(60000))), gaxgrpc::RetrySettings.FromExponentialBackoff(maxAttempts: 5, initialBackoff: sys::TimeSpan.FromMilliseconds(100), maxBackoff: sys::TimeSpan.FromMilliseconds(60000), backoffMultiplier: 1.3, retryFilter: gaxgrpc::RetrySettings.FilterForStatusCodes(grpccore::StatusCode.Aborted, grpccore::StatusCode.Cancelled, grpccore::StatusCode.Internal, grpccore::StatusCode.ResourceExhausted, grpccore::StatusCode.Unknown, grpccore::StatusCode.Unavailable, grpccore::StatusCode.DeadlineExceeded)));
+        public gaxgrpc::CallSettings PublishSettings { get; set; } = gaxgrpc::CallSettingsExtensions.WithRetry(gaxgrpc::CallSettings.FromExpiration(gax::Expiration.FromTimeout(sys::TimeSpan.FromMilliseconds(60000))), gaxgrpc::RetrySettings.FromExponentialBackoff(maxAttempts: 5, initialBackoff: sys::TimeSpan.FromMilliseconds(100), maxBackoff: sys::TimeSpan.FromMilliseconds(60000), backoffMultiplier: 4, retryFilter: gaxgrpc::RetrySettings.FilterForStatusCodes(grpccore::StatusCode.Aborted, grpccore::StatusCode.Cancelled, grpccore::StatusCode.Internal, grpccore::StatusCode.ResourceExhausted, grpccore::StatusCode.Unknown, grpccore::StatusCode.Unavailable, grpccore::StatusCode.DeadlineExceeded)));
 
         /// <summary>
         /// <see cref="gaxgrpc::CallSettings"/> for synchronous and asynchronous calls to