Evaluate expression: add ability to evaluate expression suspending on class header

idea/testData/debugger/tinyApp/outs/onClassHeader.out

@@ -0,0 +1,12 @@
+LineBreakpoint created at onClassHeader.kt:6
+!JDK_HOME!\bin\java -agentlib:jdwp=transport=dt_socket,address=!HOST_NAME!:!HOST_PORT!,suspend=y,server=n -Dfile.encoding=!FILE_ENCODING! -classpath !APP_PATH!\classes;!KOTLIN_RUNTIME!;!CUSTOM_LIBRARY!;!RT_JAR! onClassHeader.OnClassHeaderPackage
+Connected to the target VM, address: '!HOST_NAME!:PORT_NAME!', transport: 'socket'
+onClassHeader.kt:6
+onClassHeader.kt:18
+onClassHeader.kt:16
+Compile bytecode for 1 + 1
+Compile bytecode for this
+Compile bytecode for this.foo("a")
+Disconnected from the target VM, address: '!HOST_NAME!:PORT_NAME!', transport: 'socket'
+
+Process finished with exit code 0

idea/testData/debugger/tinyApp/src/evaluate/singleBreakpoint/onClassHeader.kt

@@ -0,0 +1,31 @@
+package onClassHeader
+
+fun main(args: Array<String>) {
+    val d: Base<String> = Derived()
+    //Breakpoint!
+    d.foo("")
+    val a = 1
+}
+
+open class Base<T> {
+    open fun foo(t: T): Int {
+        return 1
+    }
+}
+
+class Derived: Base<String>() {
+    override fun foo(t: String): Int {
+        return 2
+    }
+}
+
+// STEP_INTO: 2
+
+// EXPRESSION: 1 + 1
+// RESULT: 2: I
+
+// EXPRESSION: this
+// RESULT: instance of onClassHeader.Derived(id=ID): LonClassHeader/Derived;
+
+// EXPRESSION: this.foo("a")
+// RESULT: 2: I