[IR] Provide new plugin API to access declaration via FqName in the safe way

compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/klib.kt

@@ -304,7 +304,8 @@ fun GeneratorContext.generateModuleFragmentWithPlugins(
                     languageVersionSettings,
                     symbolTable,
                     typeTranslator,
-                    irBuiltIns
+                    irBuiltIns,
+                    linker = irLinker
                 )
             )
         }