chore: regenerate bigtableadmin client (#27205)

Generated in GitHub action: https://togithub.com/googleapis/googleapis/google-api-java-client-services/actions/workflows/codegen.yaml

Author: yoshi-code-bot

clients/google-api-services-bigtableadmin/v2/2.0.0/README.md

@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-bigtableadmin</artifactId>
-      <version>v2-rev20250430-2.0.0</version>
+      <version>v2-rev20250512-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-bigtableadmin:v2-rev20250430-2.0.0'
+  implementation 'com.google.apis:google-api-services-bigtableadmin:v2-rev20250512-2.0.0'
 }
 ```