fix: [file] set longer polling timeouts for filestore DeleteBackup (#9216)

* fix: set longer polling timeouts for filestore DeleteBackup

PiperOrigin-RevId: 516516980

Source-Link: googleapis/googleapis@0f334db

Source-Link: https://github.com/googleapis/googleapis-gen/commit/b375f6fe28fbff90b599aca6a421004d35cdeb80
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java-filestore/google-cloud-filestore/src/main/java/com/google/cloud/filestore/v1beta1/stub/CloudFilestoreManagerStubSettings.java

@@ -1388,13 +1388,13 @@ private static Builder initDefaults(Builder builder) {
           .setPollingAlgorithm(
               OperationTimedPollAlgorithm.create(
                   RetrySettings.newBuilder()
-                      .setInitialRetryDelay(Duration.ofMillis(10000L))
+                      .setInitialRetryDelay(Duration.ofMillis(30000L))
                       .setRetryDelayMultiplier(1.5)
                       .setMaxRetryDelay(Duration.ofMillis(60000L))
                       .setInitialRpcTimeout(Duration.ZERO)
                       .setRpcTimeoutMultiplier(1.0)
                       .setMaxRpcTimeout(Duration.ZERO)
-                      .setTotalTimeout(Duration.ofMillis(660000L))
+                      .setTotalTimeout(Duration.ofMillis(7200000L))
                       .build()));
 
       builder