[IR] Normalize temp var names in Kotlin-like dump

^KT-61983 Fixed

compiler/testData/ir/irText/classes/inlineClassSyntheticMethods.kt.txt

@@ -42,9 +42,9 @@ value class IC<TT : Any?> {
     when {
       other !is IC<TT> -> return false
     }
-    val tmp0_other_with_cast: IC<TT> = other as IC<TT>
+    val tmp_0: IC<TT> = other as IC<TT>
     when {
-      EQEQ(arg0 = <this>.#c, arg1 = tmp0_other_with_cast.#c).not() -> return false
+      EQEQ(arg0 = <this>.#c, arg1 = tmp_0.#c).not() -> return false
     }
     return true
   }