Apply the alternate maven mirror via LuceneRootConfigurationPlugin

[prudhvigodithi]

Description

Here is the initial fix #15542 only applied to build-tools, this fix now applies to LuceneRootConfigurationPlugin which should cover all the subprojects. This should resolve #15541 (comment).

Tests to ensure the alternate maven repo is added

This is just a high level test using init script.

cat > /tmp/repos.gradle << 'EOF'                                                
gradle.projectsEvaluated {
    rootProject.allprojects { p ->
        if (p.path == ':lucene:spatial-extras') {
            println "=== Repositories for ${p.path} ==="
            p.repositories.each { r ->
                if (r instanceof MavenArtifactRepository) {
                    println "  ${r.url}"
                }
            }
        }
    }
}
EOF
./gradlew -I /tmp/repos.gradle help -q

Before the fix

=== Repositories for :lucene:spatial-extras ===
  https://repo.maven.apache.org/maven2/

After the fix

=== Repositories for :lucene:spatial-extras ===
  https://repo.maven.apache.org/maven2/
  https://maven-central.storage-download.googleapis.com/maven2/

[dweiss]

Thank you! I think this will be better though - #15550