Refactor debugger tests

1. Move tests to their own module
2. Avoid sharing the 'tinyApp' project between tests
3. Clean up option directive handling

idea/jvm-debugger/jvm-debugger-test/testData/stepping/custom/smartStepIntoInterfaceImpl.kt

@@ -1,3 +1,4 @@
+// FILE: smartStepIntoInterfaceImpl.kt
 package smartStepIntoInterfaceImpl
 
 import forTests.MyJavaClass
@@ -153,3 +154,16 @@ fun testStepInto() {
     //Breakpoint!
     Obj2.staticCallInOverride("a")
 }
+
+// FILE: forTests/MyJavaClass.java
+package forTests;
+
+import org.jetbrains.annotations.NotNull;
+import java.util.List;
+
+public class MyJavaClass {
+    @NotNull
+    public static int staticFun(Object s) {
+        return 1;
+    }
+}