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/stepOver/stopInWrongClass.kt

@@ -1,3 +1,4 @@
+// FILE: stopInWrongClass.kt
 package stopInWrongClass
 
 class AA {
@@ -18,4 +19,17 @@ fun main(args: Array<String>) {
     AA().other()
 }
 
-// ADDITIONAL_BREAKPOINT: stopInWrongClass.Other.kt: Breakpoint 1
+// ADDITIONAL_BREAKPOINT: stopInWrongClass.Other.kt: Breakpoint 1
+
+// FILE: stopInWrongClass.Other.kt
+package stopInWrongClass
+
+class A {
+    fun test() {
+        // Breakpoint 1
+        foo()
+    }
+}
+
+fun foo() {
+}