feat: Maven profile for Airlock

[suztomo]

b/356854847

I confirmed the behavior by locally installing the java-shared-config ( T=$(mktemp -d) && rm -rf $T/* && mvn -Dmaven.repo.local=$T install) and created an example project that inherits the pom.xml (https://gist.github.com/suztomo/afaa743fdcfbd86d79369d8d9bfc591e):

  <parent>
    <groupId>com.google.cloud</groupId>
    <artifactId>google-cloud-shared-config</artifactId>
    <version>1.11.3</version>
  </parent>
...

  <dependencies>
    <dependency>
      <groupId>com.google.guava</groupId>
      <artifactId>guava</artifactId>
      <version>33.3.1-jre</version>
    </dependency>
...

I ran the Maven command. I observed that the dependencies come from the specified artifact registry URL:

~/airlock-use-example $  mvn -Dmaven.repo.local=$T clean install -DskipTests -Pairlock-trusted  -Dcheckstyle.skip 
...
Downloading from airlock: artifactregistry://us-maven.pkg.dev/artifact-foundry-prod/maven-3p-trusted/org/checkerframework/checker-qual/3.43.0/checker-qual-3.43.0.pom
[INFO] Initializing Credentials...
[INFO] Application Default Credentials unavailable.
[INFO] Using credentials retrieved from gcloud.
[INFO] Refreshing Credentials...
Downloaded from airlock: artifactregistry://us-maven.pkg.dev/artifact-foundry-prod/maven-3p-trusted/org/checkerframework/checker-qual/3.43.0/checker-qual-3.43.0.pom (2.1 kB at 603 B/s)
Downloading from airlock: artifactregistry://us-maven.pkg.dev/artifact-foundry-prod/maven-3p-trusted/org/checkerframework/checker-qual/3.43.0/checker-qual-3.43.0.jar
Downloaded from airlock: artifactregistry://us-maven.pkg.dev/artifact-foundry-prod/maven-3p-trusted/org/checkerframework/checker-qual/3.43.0/checker-qual-3.43.0.jar (232 kB at 94 kB/s)

(checker-qual is a dependency of guava)