[FIR] Fully expand the bounds of type parameters for canBeNull check

This is required because a not-null bound `Foo` can resolve to a
`typealias Foo = Bar?` in which case we must return true.

#KT-64645 Fixed

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

@@ -197,7 +197,7 @@ object CheckDispatchReceiver : ResolutionStage() {
 
         if (smartcastedReceiver != null &&
             !smartcastedReceiver.isStable &&
-            (isCandidateFromUnstableSmartcast || (isReceiverNullable && !smartcastedReceiver.smartcastType.canBeNull))
+            (isCandidateFromUnstableSmartcast || (isReceiverNullable && !smartcastedReceiver.smartcastType.coneType.canBeNull(callInfo.session)))
         ) {
             val dispatchReceiverType = (candidate.symbol as? FirCallableSymbol<*>)?.dispatchReceiverType?.let {
                 context.session.typeApproximator.approximateToSuperType(

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/tower/TowerLevels.kt

@@ -118,7 +118,7 @@ class MemberScopeTowerLevel(
                 // with two exceptions:
                 // - When the smart-casted type is always null, we want to return it and report UNSAFE_CALL.
                 // - When the original type can be null, in this case the smart-case either makes it not-null or the call is red anyway.
-                if (existing == null || dispatchReceiverValue.type.isNullableNothing || receiverTypeWithoutSmartCast.canBeNull) {
+                if (existing == null || dispatchReceiverValue.type.isNullableNothing || receiverTypeWithoutSmartCast.canBeNull(session)) {
                     map[candidateFromSmartCast.member] = MemberFromSmartcastScope(candidateFromSmartCast, DispatchReceiverToUse.SmartcastWithoutUnwrapping)
                 } else {
                     existing.dispatchReceiverToUse = DispatchReceiverToUse.SmartcastIfUnwrappedInvisible

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/dfa/FirDataFlowAnalyzer.kt

@@ -368,7 +368,7 @@ abstract class FirDataFlowAnalyzer(
                         if (operandVariable.isReal()) {
                             flow.addImplication((expressionVariable eq isType) implies (operandVariable typeEq type))
                         }
-                        if (!type.canBeNull) {
+                        if (!type.canBeNull(components.session)) {
                             // x is (T & Any) => x != null
                             flow.addImplication((expressionVariable eq isType) implies (operandVariable notEq null))
                         } else if (type.isMarkedNullable) {
@@ -383,7 +383,7 @@ abstract class FirDataFlowAnalyzer(
                 if (operandVariable.isReal()) {
                     flow.addTypeStatement(operandVariable typeEq type)
                 }
-                if (!type.canBeNull) {
+                if (!type.canBeNull(components.session)) {
                     flow.commitOperationStatement(operandVariable notEq null)
                 } else {
                     val expressionVariable = variableStorage.createSynthetic(typeOperatorCall)
@@ -998,9 +998,10 @@ abstract class FirDataFlowAnalyzer(
         for (conditionalEffect in conditionalEffects) {
             val effect = conditionalEffect.effect as? ConeReturnsEffectDeclaration ?: continue
             val operation = effect.value.toOperation()
-            val statements = logicSystem.approveContractStatement(conditionalEffect.condition, argumentVariables, substitutor) {
-                logicSystem.approveOperationStatement(flow, it, removeApprovedOrImpossible = operation == null)
-            } ?: continue // TODO: do what if the result is known to be false?
+            val statements =
+                logicSystem.approveContractStatement(conditionalEffect.condition, argumentVariables, substitutor) {
+                    logicSystem.approveOperationStatement(flow, it, removeApprovedOrImpossible = operation == null)
+                } ?: continue // TODO: do what if the result is known to be false?
             if (operation == null) {
                 flow.addAllStatements(statements)
             } else {