[FIR] Implement light tree DECLARATION_NAME & SIGNATURE strategies

compiler/testData/diagnostics/tests/funInterface/funInterfaceDeclarationCheck.fir.kt

@@ -87,9 +87,9 @@ class WithNestedFun<K> {
 }
 
 fun <T> local() {
-    <!LOCAL_INTERFACE_NOT_ALLOWED!>fun interface LocalFun {
+    <!LOCAL_INTERFACE_NOT_ALLOWED!>fun interface LocalFun<!> {
         fun invoke(element: T)
-    }<!>
+    }
 }
 
 fun interface WithDefaultValue {

compiler/testData/diagnostics/tests/localInterfaces.fir.kt

@@ -1,14 +1,14 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE
 
 fun foo() {
-    <!LOCAL_INTERFACE_NOT_ALLOWED!>interface a {}<!>
+    <!LOCAL_INTERFACE_NOT_ALLOWED!>interface a<!> {}
     val b = object {
-        <!LOCAL_INTERFACE_NOT_ALLOWED!>interface c {}<!>
+        <!LOCAL_INTERFACE_NOT_ALLOWED!>interface c<!> {}
     }
     class A {
-        <!LOCAL_INTERFACE_NOT_ALLOWED!>interface d {}<!>
+        <!LOCAL_INTERFACE_NOT_ALLOWED!>interface d<!> {}
     }
     val f = {
-        <!LOCAL_INTERFACE_NOT_ALLOWED!>interface e {}<!>
+        <!LOCAL_INTERFACE_NOT_ALLOWED!>interface e<!> {}
     }
 }

compiler/testData/diagnostics/tests/thisAndSuper/unqualifiedSuper/unqualifiedSuperWithLocalClass.fir.kt

@@ -1,21 +0,0 @@
-interface Interface {
-    fun foo(x: Int): Int
-}
-
-fun withLocalClasses(param: Int): Interface {
-    open class LocalBase {
-        open val param: Int
-            get() = 100
-    }
-
-    <!LOCAL_INTERFACE_NOT_ALLOWED!>interface LocalInterface : Interface {
-        override fun foo(x: Int): Int =
-                x + param
-    }<!>
-
-    return object : LocalBase(), LocalInterface {
-        override fun foo(x: Int): Int =
-                x + super.param
-    }
-
-}

compiler/testData/diagnostics/tests/thisAndSuper/unqualifiedSuper/unqualifiedSuperWithLocalClass.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 interface Interface {
     fun foo(x: Int): Int
 }