Add test on named arguments completion for Kotlin library

idea/testData/completion/basic/custom/NamedArgumentsKotlin.kt

@@ -0,0 +1,6 @@
+import lib.KotlinClass
+
+fun test() = KotlinClass().foo(<caret>)
+
+// ABSENT: p0
+// EXIST: paramName

idea/testData/completion/basic/custom/NamedArgumentsKotlinSrc/KotlinClass.kt

@@ -0,0 +1,5 @@
+package lib
+
+class KotlinClass {
+    fun foo(paramName: String) {}
+}