feat: [monitoring] Added support for severity in AlertPolicy (#10137)

* feat: Added support for severity in AlertPolicy
docs: add value range to comment on field forecast_horizon

PiperOrigin-RevId: 589949568

Source-Link: googleapis/googleapis@54bc5b6

Source-Link: https://github.com/googleapis/googleapis-gen/commit/5284b323830b15a79b4bf2799ba8d83bd1013c6a
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* 🦉 Updates from OwlBot post-processor

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* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

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java-monitoring/README.md

@@ -195,7 +195,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/google-cloud-java/java11.html
 [stability-image]: https://img.shields.io/badge/stability-stable-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-monitoring.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-monitoring/3.31.0
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-monitoring/3.33.0
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles

java-monitoring/google-cloud-monitoring/src/main/resources/META-INF/native-image/com.google.cloud.monitoring.v3/reflect-config.json

@@ -944,6 +944,15 @@
     "allDeclaredClasses": true,
     "allPublicClasses": true
   },
+  {
+    "name": "com.google.monitoring.v3.AlertPolicy$Severity",
+    "queryAllDeclaredConstructors": true,
+    "queryAllPublicConstructors": true,
+    "queryAllDeclaredMethods": true,
+    "allPublicMethods": true,
+    "allDeclaredClasses": true,
+    "allPublicClasses": true
+  },
   {
     "name": "com.google.monitoring.v3.BasicSli",
     "queryAllDeclaredConstructors": true,