[NOID] Adjusts versions job

[ncordon]

What

Uses the maven-metadata file to generate the versions.json instead of parsing the html.

I've tried (with JVM 8) doing:

mkdir -p build
./gradlew versions

and it correctly generates a build/versions.json file that contains the 5.15.0 entry:

    {
        "neo4j": "5.15.0",
        "neo4jVersion": "5.15.0",
        "apoc": "5.15.0",
        "version": "5.15.0",
        "url": "https://github.com/neo4j/apoc/releases/5.15.0",
        "homepageUrl": "https://github.com/neo4j/apoc/releases/5.15.0",
        "jar": "https://github.com/neo4j/apoc/releases/download/5.15.0/apoc-5.15.0-core.jar",
        "downloadUrl": "https://github.com/neo4j/apoc/releases/download/5.15.0/apoc-5.15.0-core.jar",
        "sha1": "f76b53599c9d0ca80a3643f489a0f662de9563c2",
        "sha256": "0c7a834d74948121666164b8f0db484e328219ec9522ae3fb5d07e05fe9ac755",
        "md5": "10e577a9cd887982b88d68003f8bb079",
        "config": {
            "+:dbms.security.procedures.unrestricted": [
                "apoc.*"
            ]
        }
    }

Why

Because that's a better source of truth. Right now https://repo1.maven.org/maven2/org/neo4j/neo4j-kernel/maven-metadata.xml is showing 5.15.0 but there's no 5.15.0 listed under https://repo1.maven.org/maven2/org/neo4j/neo4j-kernel/