FIR: Add fixes after review

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/FirTowerResolverSession.kt

@@ -90,9 +90,7 @@ class FirTowerResolverSession internal constructor(
     ): ProcessorAction {
         manager.requestGroup(group)
 
-        val levelHandler =
-            LevelHandler(
-            )
+        val levelHandler = TowerLevelHandler()
 
         return levelHandler.handleLevel(
             callInfo, explicitReceiverKind, group,

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/TowerLevelHandler.kt

@@ -35,7 +35,7 @@ internal class CandidateFactoriesAndCollectors(
 
 typealias EnqueueTasksForInvokeReceiverCandidates = () -> Unit
 
-internal class LevelHandler {
+internal class TowerLevelHandler {
 
     // Try to avoid adding additional state here
     private var processResult = ProcessorAction.NONE