Created module idea-test-framework and moved classes needed for idea tests there

Moved tests for completion and their test data into module idea-completion

idea/idea-completion/testData/basic/common/ExtensionFunReceiverForce.kt

@@ -0,0 +1,11 @@
+class Test {
+    val St<caret>
+}
+
+// INVOCATION_COUNT: 2
+// EXIST: { lookupString:"String", tailText:" (kotlin)" }
+// EXIST: IllegalStateException
+// EXIST: StringBuilder
+// EXIST_JAVA_ONLY: StringBuffer
+// EXIST_JS_ONLY: HTMLStyleElement
+// EXIST_JAVA_ONLY: { lookupString:"Statement", tailText:" (java.sql)" }