[FEA] Java bindings for AST expressions

[jlowe]

Is your feature request related to a problem? Please describe.
#5494 added AST support for composing and evaluating expressions at runtime, and it would be nice to have Java bindings for this feature.

Describe the solution you'd like
The Java bindings should have a class hierarchy similar to the native AST node types, but ideally not owning the actual underlying native objects directly. This would require the AST nodes to be AutoCloseable and leak-tracked. Instead, the use-case is likely to be one-shot build and use, so it would be easier on the application to have pure JVM classes to build the AST and a separate API to "compile" that into a native AST representation that does need to be closed and leak-tracked.

Describe alternatives you've considered
A thinner, more direct binding could be done, but this puts more burden on the application to avoid leaks and increases the object creation overhead for every node in the tree.

[vyasr]

@jlowe can we close this with #8846?

[jlowe]

Yes, this was fixed by #8846 and #8888.