fix: fix IAM retry settings (#259)

* changes without context

        autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

* chore(bazel): update gapic-generator to v2.4.6

Changes include:
- a fix for using reroute_to_grpc_interface when generating with grpc_service_config

PiperOrigin-RevId: 329771412

Source-Author: Google APIs <noreply@google.com>
Source-Date: Wed Sep 2 13:01:43 2020 -0700
Source-Repo: googleapis/googleapis
Source-Sha: 88d4f10bbe6821a3e16b082f408bc381a73860ff
Source-Link: googleapis/googleapis@88d4f10

google-cloud-kms/src/main/java/com/google/cloud/kms/v1/stub/KeyManagementServiceStubSettings.java

@@ -872,17 +872,17 @@ private static Builder initDefaults(Builder builder) {
       builder
           .setIamPolicySettings()
           .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_1_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_1_params"));
 
       builder
           .getIamPolicySettings()
           .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_1_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_1_params"));
 
       builder
           .testIamPermissionsSettings()
           .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_1_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_params"));
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_1_params"));
 
       builder
           .listKeyRingsSettings()

synth.metadata

@@ -11,8 +11,8 @@
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "b40e4533f841c96aac1d9d7d342514d146b5b4cb",
-        "internalRef": "326100874"
+        "sha": "88d4f10bbe6821a3e16b082f408bc381a73860ff",
+        "internalRef": "329771412"
       }
     },
     {