Can't expand array in watch expressions & repl

[joaomoreno]

Testing #9684

const arr = new Array(10000);
console.log(arr);

1. Set breakpoint on line 2.
2. Add arr watch expression.
3. Start debug

Can't expand the arr watch expression when paused in the breakpoint. Also can't expand the same expression in the repl.

[isidorn]

The issue here seems to be that the node debug adapter is not sending indexedVariables for evaluate calls. Forwarding to @weinand