[FE 1.0] Always create return value for CallInstruction

This fixes missing `USED_AS_EXPRESSION` recordings
^KT-47527 Fixed

compiler/testData/ir/irText/firProblems/SafeLetWithReturn.kt.txt

@@ -18,7 +18,7 @@ fun bar(s: String?, t: String?): String {
     when {
       EQEQ(arg0 = tmp0_safe_receiver, arg1 = null) -> null
       else -> tmp0_safe_receiver.let<String, Nothing?>(block = local fun <anonymous>(it: String): Nothing? {
-        { // BLOCK
+        return { // BLOCK
           val tmp0_safe_receiver: String? = t
           when {
             EQEQ(arg0 = tmp0_safe_receiver, arg1 = null) -> null
@@ -27,7 +27,7 @@ fun bar(s: String?, t: String?): String {
             }
 )
           }
-        } /*~> Unit */
+        }
       }
 )
     }

compiler/testData/ir/irText/firProblems/SafeLetWithReturn.txt

@@ -50,7 +50,7 @@ FILE fqName:<root> fileName:/SafeLetWithReturn.kt
                   FUN LOCAL_FUNCTION_FOR_LAMBDA name:<anonymous> visibility:local modality:FINAL <> (it:kotlin.String) returnType:kotlin.Nothing?
                     VALUE_PARAMETER name:it index:0 type:kotlin.String
                     BLOCK_BODY
-                      TYPE_OP type=kotlin.Unit origin=IMPLICIT_COERCION_TO_UNIT typeOperand=kotlin.Unit
+                      RETURN type=kotlin.Nothing from='local final fun <anonymous> (it: kotlin.String): kotlin.Nothing? declared in <root>.bar'
                         BLOCK type=kotlin.Nothing? origin=SAFE_CALL
                           VAR IR_TEMPORARY_VARIABLE name:tmp_2 type:kotlin.String? [val]
                             GET_VAR 't: kotlin.String? declared in <root>.bar' type=kotlin.String? origin=null

compiler/testData/ir/irText/firProblems/kt19251.kt.txt

@@ -1,7 +1,7 @@
 fun box(): String {
   val map: MutableMap<Fun, String> = mutableMapOf<Fun, String>()
   val fn: Fun = local fun <anonymous>(it: @FlexibleNullability String?): @FlexibleNullability String? {
-    TODO()
+    return TODO()
   }
  /*-> Fun */
   return map.computeIfAbsent(p0 = fn, p1 = local fun <anonymous>(it: @EnhancedNullability Fun): @EnhancedNullability String {

compiler/testData/ir/irText/firProblems/kt19251.txt

@@ -11,7 +11,8 @@ FILE fqName:<root> fileName:/test.kt
             FUN LOCAL_FUNCTION_FOR_LAMBDA name:<anonymous> visibility:local modality:FINAL <> (it:@[FlexibleNullability] kotlin.String?) returnType:@[FlexibleNullability] kotlin.String?
               VALUE_PARAMETER name:it index:0 type:@[FlexibleNullability] kotlin.String?
               BLOCK_BODY
-                CALL 'public final fun TODO (): kotlin.Nothing [inline] declared in kotlin.StandardKt' type=kotlin.Nothing origin=null
+                RETURN type=kotlin.Nothing from='local final fun <anonymous> (it: @[FlexibleNullability] kotlin.String?): @[FlexibleNullability] kotlin.String? declared in <root>.box'
+                  CALL 'public final fun TODO (): kotlin.Nothing [inline] declared in kotlin.StandardKt' type=kotlin.Nothing origin=null
       RETURN type=kotlin.Nothing from='public final fun box (): kotlin.String declared in <root>'
         TYPE_OP type=kotlin.String origin=IMPLICIT_NOTNULL typeOperand=kotlin.String
           CALL 'public open fun computeIfAbsent (p0: @[EnhancedNullability] K of kotlin.collections.MutableMap, p1: @[EnhancedNullability] java.util.function.Function<in @[EnhancedNullability] K of kotlin.collections.MutableMap, out @[EnhancedNullability] V of kotlin.collections.MutableMap>): @[EnhancedNullability] V of kotlin.collections.MutableMap declared in kotlin.collections.MutableMap' type=@[EnhancedNullability] kotlin.String origin=null