[FIR] Fix false negative REDUNDANT_CALL_OF_CONVERSION_METHOD

... in presence of typealiases.

#KT-61921

compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantCallOfConversionMethod/int.fir.txt

@@ -1,3 +1,8 @@
 FILE: int.kt
     public final val foo: R|kotlin/Int| = Int(1).R|kotlin/Int.toInt|()
         public get(): R|kotlin/Int|
+    public final typealias IntAlias = R|kotlin/Int|
+    public final val aliased: R|IntAlias| = Int(1)
+        public get(): R|IntAlias|
+    public final val bar: R|kotlin/Int| = R|/aliased|.R|kotlin/Int.toInt|()
+        public get(): R|kotlin/Int|

compiler/fir/analysis-tests/testData/resolve/extendedCheckers/RedundantCallOfConversionMethod/int.kt

@@ -1,2 +1,7 @@
 // WITH_STDLIB
-val foo = 1.<!REDUNDANT_CALL_OF_CONVERSION_METHOD!>toInt()<!>
+val foo = 1.<!REDUNDANT_CALL_OF_CONVERSION_METHOD!>toInt()<!>
+
+typealias IntAlias = Int
+val aliased: IntAlias = 1
+
+val bar = aliased.<!REDUNDANT_CALL_OF_CONVERSION_METHOD!>toInt()<!>

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/extended/RedundantCallOfConversionMethod.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.fir.analysis.checkers.extended
 
 import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
 import org.jetbrains.kotlin.diagnostics.reportOn
+import org.jetbrains.kotlin.fir.FirSession
 import org.jetbrains.kotlin.fir.analysis.checkers.context.CheckerContext
 import org.jetbrains.kotlin.fir.analysis.checkers.expression.FirQualifiedAccessExpressionChecker
 import org.jetbrains.kotlin.fir.analysis.diagnostics.FirErrors
@@ -15,6 +16,7 @@ import org.jetbrains.kotlin.fir.expressions.FirExpression
 import org.jetbrains.kotlin.fir.expressions.FirFunctionCall
 import org.jetbrains.kotlin.fir.expressions.FirQualifiedAccessExpression
 import org.jetbrains.kotlin.fir.psi
+import org.jetbrains.kotlin.fir.analysis.checkers.fullyExpandedClassId
 import org.jetbrains.kotlin.fir.types.ConeFlexibleType
 import org.jetbrains.kotlin.fir.types.classId
 import org.jetbrains.kotlin.fir.types.isMarkedNullable
@@ -29,12 +31,12 @@ object RedundantCallOfConversionMethod : FirQualifiedAccessExpressionChecker() {
         val functionName = expression.calleeReference.name.asString()
         val qualifiedType = targetClassMap[functionName] ?: return
 
-        if (expression.explicitReceiver?.isRedundant(qualifiedType) == true) {
+        if (expression.explicitReceiver?.isRedundant(qualifiedType, context.session) == true) {
             reporter.reportOn(expression.source, FirErrors.REDUNDANT_CALL_OF_CONVERSION_METHOD, context)
         }
     }
 
-    private fun FirExpression.isRedundant(qualifiedClassId: ClassId): Boolean {
+    private fun FirExpression.isRedundant(qualifiedClassId: ClassId, session: FirSession): Boolean {
         val thisType = if (this is FirConstExpression<*>) {
             this.resolvedType.classId
         } else {
@@ -43,7 +45,7 @@ object RedundantCallOfConversionMethod : FirQualifiedAccessExpressionChecker() {
                 psi?.parent !is KtSafeQualifiedExpression
                         && (psi is KtSafeQualifiedExpression || resolvedType.isMarkedNullable) -> null
                 this.resolvedType.isMarkedNullable -> null
-                else -> this.resolvedType.classId
+                else -> this.resolvedType.fullyExpandedClassId(session)
             }
         }
         return thisType == qualifiedClassId