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/weighers/smart/FunctionExpected.kt

@@ -0,0 +1,15 @@
+fun foo(filter: (String) -> Boolean) {}
+
+fun doFilter(s: String): Boolean = true
+fun x(s: String): Boolean = true
+
+fun bar(p: (String) -> Boolean) {
+    foo(<caret>)
+}
+
+// ORDER: ::doFilter
+// ORDER: p
+// ORDER: {...}
+// ORDER: { String -> ... }
+// ORDER: ::error
+// ORDER: ::x