chore: Release library Google.Cloud.Bigtable.Admin.V2 version 3.31.0

### New features

- Add TieredStorageConfig to table admin api

Librarian-Release-Library: Google.Cloud.Bigtable.Admin.V2
Librarian-Release-Version: 3.31.0
Librarian-Release-ID: release-20260202T140248Z

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

apis/Google.Cloud.Bigtable.Admin.V2/Google.Cloud.Bigtable.Admin.V2/Google.Cloud.Bigtable.Admin.V2.csproj

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <Version>3.30.0</Version>
+    <Version>3.31.0</Version>
     <TargetFrameworks>netstandard2.0;net462</TargetFrameworks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <Description>Recommended Google client library to access the Google Cloud Bigtable Instance and Table Admin APIs.</Description>

apis/Google.Cloud.Bigtable.Admin.V2/docs/history.md

@@ -1,5 +1,11 @@
 # Version history
 
+## Version 3.31.0, released 2026-02-02
+
+### New features
+
+- Add TieredStorageConfig to table admin api
+
 ## Version 3.30.0, released 2025-11-05
 
 ### New features

generator-input/apis.json

@@ -1257,7 +1257,7 @@
       "protoPath": "google/bigtable/admin/v2",
       "productName": "Google Cloud Bigtable Administration",
       "productUrl": "https://cloud.google.com/bigtable/",
-      "version": "3.30.0",
+      "version": "3.31.0",
       "commonResourcesConfig": "tweaks/Google.Cloud.Bigtable.Common.V2/CommonResourcesConfig.json",
       "type": "grpc",
       "description": "Recommended Google client library to access the Google Cloud Bigtable Instance and Table Admin APIs.",

generator-input/pipeline-state.json

@@ -793,12 +793,12 @@
         },
         {
             "id": "Google.Cloud.Bigtable.Admin.V2",
-            "currentVersion": "3.30.0",
+            "currentVersion": "3.31.0",
             "generationAutomationLevel": "AUTOMATION_LEVEL_AUTOMATIC",
             "releaseAutomationLevel": "AUTOMATION_LEVEL_AUTOMATIC",
-            "releaseTimestamp": "2025-11-05T08:50:25.047605824Z",
+            "releaseTimestamp": "2026-02-02T14:08:49.604101116Z",
             "lastGeneratedCommit": "a6cbf809c4c165e618ee23a059442af90a80a0f5",
-            "lastReleasedCommit": "3b2a2ae91db23a9c879b2b725d6a5de6bd64a800",
+            "lastReleasedCommit": "a6cbf809c4c165e618ee23a059442af90a80a0f5",
             "apiPaths": [
                 "google/bigtable/admin/v2"
             ],