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

^KT-61983 Fixed

compiler/testData/ir/irText/expressions/elvis.kt.txt

@@ -8,20 +8,20 @@ fun foo(): Any? {
 
 fun test1(a: Any?, b: Any): Any {
   return { // BLOCK
-    val tmp0_elvis_lhs: Any? = a
+    val tmp_0: Any? = a
     when {
-      EQEQ(arg0 = tmp0_elvis_lhs, arg1 = null) -> b
-      else -> tmp0_elvis_lhs
+      EQEQ(arg0 = tmp_0, arg1 = null) -> b
+      else -> tmp_0
     }
   }
 }
 
 fun test2(a: String?, b: Any): Any {
   return { // BLOCK
-    val tmp0_elvis_lhs: String? = a
+    val tmp_1: String? = a
     when {
-      EQEQ(arg0 = tmp0_elvis_lhs, arg1 = null) -> b
-      else -> tmp0_elvis_lhs
+      EQEQ(arg0 = tmp_1, arg1 = null) -> b
+      else -> tmp_1
     }
   }
 }
@@ -34,30 +34,30 @@ fun test3(a: Any?, b: Any?): String {
     a !is String? -> return ""
   }
   return { // BLOCK
-    val tmp0_elvis_lhs: String? = a /*as String? */
+    val tmp_2: String? = a /*as String? */
     when {
-      EQEQ(arg0 = tmp0_elvis_lhs, arg1 = null) -> b /*as String */
-      else -> tmp0_elvis_lhs
+      EQEQ(arg0 = tmp_2, arg1 = null) -> b /*as String */
+      else -> tmp_2
     }
   }
 }
 
 fun test4(x: Any): Any {
   return { // BLOCK
-    val tmp0_elvis_lhs: Any? = <get-p>()
+    val tmp_3: Any? = <get-p>()
     when {
-      EQEQ(arg0 = tmp0_elvis_lhs, arg1 = null) -> x
-      else -> tmp0_elvis_lhs
+      EQEQ(arg0 = tmp_3, arg1 = null) -> x
+      else -> tmp_3
     }
   }
 }
 
 fun test5(x: Any): Any {
   return { // BLOCK
-    val tmp0_elvis_lhs: Any? = foo()
+    val tmp_4: Any? = foo()
     when {
-      EQEQ(arg0 = tmp0_elvis_lhs, arg1 = null) -> x
-      else -> tmp0_elvis_lhs
+      EQEQ(arg0 = tmp_4, arg1 = null) -> x
+      else -> tmp_4
     }
   }
 }