KT-7901 Auto import is not suggested

KT-7229 Completion for extension functions with complex capture

 #KT-7901 Fixed
 #KT-7229 Fixed

idea/idea-completion/testData/basic/common/extensions/ComplexCapture2.kt

@@ -0,0 +1,11 @@
+interface D<T>
+
+fun <T1, T2 : D<T1>> T2.ext() {}
+
+class C : D<String> {
+    fun foo() {
+        this.<caret>
+    }
+}
+
+// EXIST: ext