AMBARI-26264. Disable releases for apache-snapshots repo

[adoroszlai]

What changes were proposed in this pull request?

Problem: build tries to download release artifacts from apache-snapshots repo, and non-Apache artifacts from apache-releases repo.

[INFO] Downloading from apache-releases: https://repository.apache.org/content/repositories/releases/com/google/guava/guava/28.0-jre/guava-28.0-jre.pom
[INFO] Downloading from apache-snapshots: https://repository.apache.org/content/repositories/snapshots/com/google/guava/guava/28.0-jre/guava-28.0-jre.pom
[INFO] Downloading from central: https://repo.maven.apache.org/maven2/com/google/guava/guava/28.0-jre/guava-28.0-jre.pom
[INFO] Downloaded from central: https://repo.maven.apache.org/maven2/com/google/guava/guava/28.0-jre/guava-28.0-jre.pom (8.7 kB at 513 kB/s)

Fix:

• disable release artifacts in apache-snapshots
• remove apache-releases repo, use central (inherited) instead

https://issues.apache.org/jira/browse/AMBARI-26264

How was this patch tested?

$ mvn -N --batch-mode eu.maveniverse.maven.plugins:toolbox:list-repositories
...
[INFO] --- toolbox:0.6.0:list-repositories (default-cli) @ ambari-metrics ---
[INFO] Remote repositories used by project org.apache.ambari:ambari-metrics:pom:3.1.0-SNAPSHOT.
[INFO]  * central (https://repo.maven.apache.org/maven2/, default, releases)
[INFO]    First introduced on root
[INFO]  * apache-snapshots (https://repository.apache.org/content/repositories/snapshots, default, snapshots)
[INFO]    First introduced on root

Local build.

[adoroszlai]

@JiaLiangC @arshadmohammad please review

Failing tests are due to AMBARI-26142, as mentioned in #134 (comment)

[adoroszlai]

@JiaLiangC @arshadmohammad can you please help review this?