[JVM IR] KTIJ-24335 Require stubbing for built-in symbol deduplication

- Built-in symbol deduplication has only been tested with stubbing
  enabled. Because there is no current use case for deduplication
  without stubbing, an exception will be thrown to communicate the
  misconfiguration.

compiler/ir/backend.jvm/entrypoint/src/org/jetbrains/kotlin/backend/jvm/JvmIrCodegenFactory.kt

@@ -86,6 +86,15 @@ open class JvmIrCodegenFactory(
         IdeCodegenSettings(shouldStubAndNotLinkUnboundSymbols = shouldStubAndNotLinkUnboundSymbols),
     )
 
+    init {
+        if (ideCodegenSettings.shouldDeduplicateBuiltInSymbols && !ideCodegenSettings.shouldStubAndNotLinkUnboundSymbols) {
+            throw IllegalStateException(
+                "`shouldDeduplicateBuiltInSymbols` depends on `shouldStubAndNotLinkUnboundSymbols` being enabled. Deduplication of" +
+                        " built-in symbols hasn't been tested without stubbing and there is currently no use case for it without stubbing."
+            )
+        }
+    }
+
     /**
      * @param shouldStubOrphanedExpectSymbols See [stubOrphanedExpectSymbols].
      * @param shouldDeduplicateBuiltInSymbols See [SymbolTableWithBuiltInsDeduplication].