Forbid "safe delete" for anonymous objects

idea/testData/safeDelete/deleteObject/kotlinObject/anonymousObject.kt

@@ -0,0 +1,7 @@
+trait A
+
+fun foo(): A {
+    return <caret>object: A {
+
+    }
+}

idea/testData/safeDelete/deleteObject/kotlinObject/anonymousObject.kt.after

@@ -0,0 +1,7 @@
+trait A
+
+fun foo(): A {
+    return object: A {
+
+    }
+}