Remove support for non-JavaScript UDFs

As recently reported in the user mailing list, JSR-223 languages other than JavaScript no longer work since version 3.0.

The reason is that the sandbox implemented in CASSANDRA-9402 restricts the use of "evil" packages, classes and functions. Unfortunately, even "non-evil" packages from JSR-223 providers are blocked.

In order to get a JSR-223 provider working fine, we need to allow JSR-223 provider specific packages and also allow specific runtime permissions.

The fact that "arbitrary" JSR-223 providers no longer work since 3.0 has just been reported recently, means that this functionality (i.e. non-JavaSCript JSR-223 UDFs) is obviously not used.

Therefore I propose to remove support for UDFs that do not use Java or JavaScript in 4.0. This will also allow to specialize scripted UDFs on Nashorn and allow to use its security features, although these are limited, more extensively. (Clarification: this ticket is just about to remove that support)

Also want to point out that we never "officially" supported UDFs that are not Java or JavaScript.

Sample error message:

Traceback (most recent call last):
  File "/usr/bin/cqlsh.py", line 1264, in perform_simple_statement
    result = future.result()
  File "/usr/share/cassandra/lib/cassandra-driver-internal-only-3.5.0.post0-d8d0456.zip/cassandra-driver-3.5.0.post0-d8d0456/cassandra/cluster.py", line 3650, in result
    raise self._final_exception
FunctionFailure: Error from server: code=1400 [User Defined Function failure] message="execution of 'e.test123[bigint]' failed: java.security.AccessControlException: access denied: ("java.lang.RuntimePermission" "accessClassInPackage.org.python.jline.console")