[IR] User-friendly message about unexpected unlinked symbols

^KT-53649

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/IrMessageLogger.kt

@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.ir.util
 
+import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.config.CompilerConfigurationKey
 
 interface IrMessageLogger {
@@ -25,4 +26,7 @@ interface IrMessageLogger {
         @JvmStatic
         val IR_MESSAGE_LOGGER = CompilerConfigurationKey<IrMessageLogger>("ir message logger")
     }
-}
+}
+
+val CompilerConfiguration.irMessageLogger: IrMessageLogger
+    get() = this[IrMessageLogger.IR_MESSAGE_LOGGER] ?: IrMessageLogger.None

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/SymbolTable.kt

@@ -1177,10 +1177,3 @@ val SymbolTable.allUnbound: Set<IrSymbol>
         addUnbound(unboundTypeAliases)
         addUnbound(unboundTypeParameters)
     }
-
-fun SymbolTable.noUnboundLeft(message: String) {
-    val unbound = this.allUnbound
-    assert(unbound.isEmpty()) {
-        message + "\n" + unbound.joinToString("\n")
-    }
-}