Exclude Tinkerpop unused transitive dependencies

The driver has a dependency on Tinkerpop gremlin-driver, which in turn depends on Groovy:

This is problematic because this is Groovy 2, but some apps may pull in Groovy 3, and that results in runtime errors.

In any case, the driver doesn't need Groovy for Graph queries. It is safe to exclude these dependencies.

Note: if possible, we can also investigate if other Tinkerpop dependencies could be excluded as well. In particular the ones below: