Move all basic completion tests to common folder

idea/testData/completion/basic/common/InObjectInDelegationSpecifier.kt

@@ -0,0 +1,11 @@
+open class PageManager(a: Runnable)
+class Tab
+
+class ChromePageManager(): PageManager(object : Runnable {
+    public override fun run() {
+        val ab : Ta<caret> = null
+    }
+}) {
+}
+
+// EXIST: Tab