Explore possibility of altering permissions of Zinc's ClassLoader

[radeusgd]

Summary

Zinc loads compiled classes to analyse Java<->Scala dependencies.
When it loads classes using Truffle API, it fails with an IllegalAccessError due to insufficient permsssions.
It may be possible to override this somehow.

Value

We are able to use incremental compilation with Java 11 builds.

Specification

• Add code around JavaAnalyze that logs what modules are accessible by the classloader, if possible, to improve debugging
• Explore why adding options to sbt's JVM doesn't seem to affect the classloaders permissions (we had to use --upgrade-module-path to replace with the more open Truffle JAR, instead of --module-path and --add-exports)
• Explore if it is possible to programmatically change the permissions for the classloader to ignore the module issues
• Ask (?) on the Graal Slack if they use some special classloader and if it is possible to use it

Acceptance Criteria & Test Cases

• The tasks above have been completed or we know why it is impossible to do them