Tests: minor, move diagnostic test missingNames.kt

Looks like it was placed in the `duplicateJvmSignature` directory by
mistake.

compiler/testData/diagnostics/tests/incompleteCode/missingNames.kt

@@ -0,0 +1,67 @@
+// !DIAGNOSTICS: -DUPLICATE_CLASS_NAMES
+<!CONFLICTING_OVERLOADS, FUNCTION_DECLARATION_WITH_NO_NAME!>fun ()<!> {
+
+}
+
+<!FUNCTION_DECLARATION_WITH_NO_NAME!>fun Outer.()<!> {
+
+}
+
+<!REDECLARATION!>val<!SYNTAX!><!> : Int = 1<!>
+
+<!REDECLARATION!>class<!SYNTAX!><!> {
+
+}<!>
+
+object<!SYNTAX!><!> {
+
+}
+
+interface<!SYNTAX!><!> {
+
+}
+
+enum class<!SYNTAX!><!> {
+
+}
+
+annotation class<!SYNTAX!><!> {
+
+}
+
+class Outer {
+    <!FUNCTION_DECLARATION_WITH_NO_NAME!>fun ()<!> {
+
+    }
+
+    <!REDECLARATION!>val<!SYNTAX!><!> : Int = 1<!>
+
+    <!REDECLARATION!>class<!SYNTAX!><!> {
+
+    }<!>
+
+    <!REDECLARATION!>object<!><!SYNTAX!><!> {
+
+    }
+
+    <!REDECLARATION!>interface<!SYNTAX!><!> {
+
+    }<!>
+
+    <!REDECLARATION!>enum class<!SYNTAX!><!> {
+
+    }<!>
+
+    <!REDECLARATION!>annotation class<!SYNTAX!><!> {
+
+    }<!>
+}
+
+fun outerFun() {
+    fun () {
+
+    }
+    fun () {
+
+    }
+}