Move debugger test data to the new location

idea/jvm-debugger/jvm-debugger-test/testData/sequence/streams/collection/flatMap/FlatMap.kt

@@ -0,0 +1,6 @@
+package streams.collection.flatMap
+
+fun main(args: Array<String>) {
+  // Breakpoint!
+  listOf(2, 3).flatMap { 0..it }
+}

idea/jvm-debugger/jvm-debugger-test/testData/sequence/streams/collection/flatMap/flatMap.out

@@ -0,0 +1,17 @@
+LineBreakpoint created at FlatMap.kt:5
+Run Java
+Connected to the target VM
+FlatMap.kt:5
+listOf(2, 3)
+.flatMap({ 0..it })
+flatMap
+    before: 2
+    after: nothing
+mappings for flatMap
+  direct:
+    2 -> nothing
+  reverse:
+    empty
+Disconnected from the target VM
+
+Process finished with exit code 0