[IR] Rename LinkageError symbol to IrLinkageError

This is needed to 1) avoid ambiguity about the type of linkage used in Kotlin/Native compiler, 2) have the same exception name in JS and Native backends.

^KT-50775

libraries/stdlib/js-ir/runtime/unlinked.kt

@@ -5,8 +5,8 @@
 
 package kotlin.js
 
-internal class LinkageError(message: String?) : Error(message)
+internal class IrLinkageError(message: String?) : Error(message)
 
 internal fun throwLinkageError(message: String?): Nothing {
-    throw LinkageError(message)
+    throw IrLinkageError(message)
 }