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/stepIntoStdlibInlineFun2step.out

@@ -1,11 +1,11 @@
-LineBreakpoint created at functionInLibrary.kt:4
+LineBreakpoint created at functionInLibrary.kt:5
 Run Java
 Connected to the target VM
-functionInLibrary.kt:4
-functionInLibrary.kt:8
-functionInLibrary.kt:9
 functionInLibrary.kt:5
-stepIntoStdlibInlineFun2step.kt:5
+functionInLibrary.kt:9
+functionInLibrary.kt:10
+functionInLibrary.kt:6
+stepIntoStdlibInlineFun2step.kt:6
 Disconnected from the target VM
 
 Process finished with exit code 0