regen: Regenerate Google.Cloud.Maintenance.Api.V1Beta at API commit fe58211

feat: add support for v1 version of Maintenance API


PiperOrigin-RevId: 840720260
Source-Link: googleapis/googleapis@fe58211

Author: google-cloud-sdk-librarian-dotnet-robot

generator-input/pipeline-state.json

@@ -4429,7 +4429,7 @@
             "generationAutomationLevel": "AUTOMATION_LEVEL_AUTOMATIC",
             "releaseAutomationLevel": "AUTOMATION_LEVEL_AUTOMATIC",
             "releaseTimestamp": "2025-11-05T22:19:38.890352135Z",
-            "lastGeneratedCommit": "36533b09a6b383f3c30d13c3c26092154ecf5388",
+            "lastGeneratedCommit": "fe58211356a91f4140ed51893703910db05ade91",
             "lastReleasedCommit": "36533b09a6b383f3c30d13c3c26092154ecf5388",
             "apiPaths": [
                 "google/cloud/maintenance/api/v1beta"