Parse expressions from an activity implementation property

[andrei-ungureanu-uipath]

The CompiledExpressionActivityVisitor parser doesn't find expressions from an activity Implementation. This means that those expressions won't have a CompiledExpressionRoot and will rely on legacy code to compile for VB and for C# doesn't work at all.

Here is an example of an activity that will not have the expression compiled:

class ActivityWithVBValue : Activity
{
    public ActivityWithVBValue()
    {
        Implementation = () => new WriteLine() 
        { 
            Text = new InArgument<string>(new VisualBasicValue<string>("will not compile")) 
        };
    }
}