[WIP] Support TruffleException stack trace in polyglot isolate.

[graalvmbot]

This pull request adds support for stack traces of foreign Truffle exceptions hosted in an isolated heap.
To enable this, all stack frame operations must use the interop protocol so they can be forwarded into the polyglot isolate.

Examples:
Host object:

public final class HostApi {

    public HostApi() {
    }

    public void execute() {
        executeImpl();
    }

    private void executeImpl() {
        fail();
    }

    private void fail() {
        throw new IllegalStateException("Not supported");
    }

    public void call(Value callback) {
        callback.execute();
    }
}

Isolated JavaScript snippets with corresponding stack traces:
Guest language exception:

function main() {
        outer();
    }
    
    function outer() {
        inner();
    }
    
    function inner() {
        fail();
    }
    
    function fail() {
        throw Error('Test exception')
    }

    main()

Stack trace:

Error: Error: Test exception
        at <js> fail(Unnamed:14:131-153)
        at <js> inner(Unnamed:10:92-97)
        at <js> outer(Unnamed:6:57-63)
        at <js> main(Unnamed:2:22-28)
        at <js> :program(Unnamed:17:158-163)
        at org.graalvm.polyglot.Context.eval(Context.java:1)
        at org.me.Main.testJavaScriptException(Main.java:1)
        at org.me.Main.main(Main.java:1

Host languge exception:

HostApi = Java.type('org.me.HostApi')
    api = new HostApi()
    
    function main() {
        outer();
    }
    
    function outer() {
        inner();
    }
    
    function inner() {
        api.execute()
    }

    main()

Stack trace:

java.lang.IllegalStateException: Not supported
        at org.me.HostApi.fail(HostApi.java:1)
        at org.me.HostApi.executeImpl(HostApi.java:1)
        at org.me.HostApi.execute(HostApi.java:1)
        at <js> inner(Unknown)
        at <js> outer(Unnamed:9:116-122)
        at <js> main(Unnamed:5:81-87)
        at <js> :program(Unnamed:16:168-173)
        at org.graalvm.polyglot.Context.eval(Context.java:1)
        at org.me.Main.testJavaScriptHostException(Main.java:1)
        at org.me.Main.main(Main.java:1

Host language exception with interleaved host-guest calls.

HostApi = Java.type('org.me.HostApi')
    api = new HostApi()
    
    function main() {
        outer();
    }
    
    function outer() {
        inner();
    }
    
    function inner() {
        api.call(callback)
    }
    
    function callback() {
        api.execute()
    }

    main()

Stack trace:

java.lang.IllegalStateException: Not supported
        at org.me.HostApi.fail(HostApi.java:1)
        at org.me.HostApi.executeImpl(HostApi.java:1)
        at org.me.HostApi.execute(HostApi.java:1)
        at <js> callback(Unknown)
        at org.graalvm.polyglot.Value.execute(Value.java:1)
        at org.me.HostApi.call(HostApi.java:1)
        at <js> inner(Unknown)
        at <js> outer(Unnamed:9:116-122)
        at <js> main(Unnamed:5:81-87)
        at <js> :program(Unnamed:20:216-221)
        at org.graalvm.polyglot.Context.eval(Context.java:1)
        at org.me.Main.testJavaScriptHostException2(Main.java:1)
        at org.me.Main.main(Main.java:1)