[google-auth-library-java] mvn format v2.25 may be incompatible with Java 25

Need to investigate this. Error:
```
[ERROR] Failed to execute goal com.spotify.fmt:fmt-maven-plugin:2.25:format (default-cli) on project google-auth-library-credentials: Execution default-cli of goal com.spotify.fmt:fmt-maven-plugin:2.25:format failed: An API incompatibility was encountered while executing com.spotify.fmt:fmt-maven-plugin:2.25:format: java.lang.NoSuchMethodError: null
[ERROR] -----------------------------------------------------
[ERROR] realm = plugin>com.spotify.fmt:fmt-maven-plugin:2.25
[ERROR] strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy
[ERROR] urls[0] = file:/Users/lawrenceqiu/.m2/repository/com/spotify/fmt/fmt-maven-plugin/2.25/fmt-maven-plugin-2.25.jar
[ERROR] urls[1] = file:/Users/lawrenceqiu/.m2/repository/com/google/googlejavaformat/google-java-format/1.25.2/google-java-format-1.25.2.jar
[ERROR] urls[2] = file:/Users/lawrenceqiu/.m2/repository/com/google/guava/guava/32.1.3-jre/guava-32.1.3-jre.jar
[ERROR] urls[3] = file:/Users/lawrenceqiu/.m2/repository/com/google/guava/failureaccess/1.0.1/failureaccess-1.0.1.jar
[ERROR] urls[4] = file:/Users/lawrenceqiu/.m2/repository/com/google/guava/listenablefuture/9999.0-empty-to-avoid-conflict-with-guava/listenablefuture-9999.0-empty-to-avoid-conflict-with-guava.jar
[ERROR] urls[5] = file:/Users/lawrenceqiu/.m2/repository/com/google/code/findbugs/jsr305/3.0.2/jsr305-3.0.2.jar
[ERROR] urls[6] = file:/Users/lawrenceqiu/.m2/repository/org/checkerframework/checker-qual/3.37.0/checker-qual-3.37.0.jar
[ERROR] urls[7] = file:/Users/lawrenceqiu/.m2/repository/com/google/errorprone/error_prone_annotations/2.21.1/error_prone_annotations-2.21.1.jar
[ERROR] urls[8] = file:/Users/lawrenceqiu/.m2/repository/com/google/j2objc/j2objc-annotations/2.8/j2objc-annotations-2.8.jar
[ERROR] urls[9] = file:/Users/lawrenceqiu/.m2/repository/org/apache/commons/commons-lang3/3.12.0/commons-lang3-3.12.0.jar
[ERROR] urls[10] = file:/Users/lawrenceqiu/.m2/repository/org/eclipse/sisu/org.eclipse.sisu.inject/0.9.0.M2/org.eclipse.sisu.inject-0.9.0.M2.jar
[ERROR] urls[11] = file:/Users/lawrenceqiu/.m2/repository/org/codehaus/plexus/plexus-component-annotations/2.1.0/plexus-component-annotations-2.1.0.jar
[ERROR] urls[12] = file:/Users/lawrenceqiu/.m2/repository/org/codehaus/plexus/plexus-utils/3.5.1/plexus-utils-3.5.1.jar
[ERROR] Number of foreign imports: 1
[ERROR] import: Entry[import from realm ClassRealm[project>com.google.auth:google-auth-library-parent:1.39.2-SNAPSHOT, parent: ClassRealm[maven.api, parent: null]]]
[ERROR]
[ERROR] -----------------------------------------------------
[ERROR] : 'java.util.Queue com.sun.tools.javac.util.Log$DeferredDiagnosticHandler.getDiagnostics()'
[ERROR] -> [Help 1]
```

Using Java 25 Temurin

Start by reproducing the fmt-maven-plugin:2.25 failure in the google-auth-library-java build with Java 25 Temurin, then inspect the Maven formatting configuration and the reported google-java-format dependency versions. Done means formatting runs successfully on Java 25, or the incompatibility and supported configuration are clearly documented.

Written by the indexing model from the issue text.