[PL] Fix: Don't run partial linkage on early stages when no external dependencies have been loaded yet

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

@@ -120,7 +120,7 @@ fun compileIr(
     val irProviders = listOf(irLinker)
     ExternalDependenciesGenerator(symbolTable, irProviders).generateUnboundSymbolsAsDependencies()
 
-    irLinker.postProcess()
+    irLinker.postProcess(inOrAfterLinkageStep = true)
     irLinker.checkNoUnboundSymbols(symbolTable, "at the end of IR linkage process")
 
     allModules.forEach { module ->

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/ic/JsIrLinkerLoader.kt

@@ -71,7 +71,7 @@ internal data class LoadedJsIr(
     fun loadUnboundSymbols() {
         signatureProvidersImpl.clear()
         ExternalDependenciesGenerator(linker.symbolTable, listOf(linker)).generateUnboundSymbolsAsDependencies()
-        linker.postProcess()
+        linker.postProcess(inOrAfterLinkageStep = true)
         linker.checkNoUnboundSymbols(linker.symbolTable, "at the end of IR linkage process")
     }
 }