fix: Add IAM dependency for DiscoveryEngine.V1Beta

Author: robertvoinescu-work

generator-input/apis.json

@@ -2629,6 +2629,7 @@
         "media"
       ],
       "dependencies": {
+        "Google.Cloud.Iam.V1": "3.5.0",
         "Google.Cloud.Location": "2.4.0",
         "Google.LongRunning": "3.5.0"
       },

generator-input/pipeline-state.json

@@ -1447,7 +1447,7 @@
             "generationAutomationLevel": "AUTOMATION_LEVEL_AUTOMATIC",
             "releaseAutomationLevel": "AUTOMATION_LEVEL_AUTOMATIC",
             "releaseTimestamp": "2026-04-13T15:46:05.863686389Z",
-            "lastGeneratedCommit": "f054d2af61fffbfab799c6737315ceb613a80f2c",
+            "lastGeneratedCommit": "f01ba6bda9ef3a45069a699767ee7dc46f30028a",
             "lastReleasedCommit": "f01ba6bda9ef3a45069a699767ee7dc46f30028a",
             "apiPaths": [
                 "google/cloud/discoveryengine/v1beta"