Support delegation by interface for inline classes in FIR

#KT-27435 Fixed

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/declaration/FirInlineClassDeclarationChecker.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.fir.analysis.checkers.declaration
 
 import org.jetbrains.kotlin.KtFakeSourceElementKind
 import org.jetbrains.kotlin.KtRealSourceElementKind
+import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.diagnostics.DiagnosticReporter
 import org.jetbrains.kotlin.diagnostics.reportOn
@@ -17,6 +18,8 @@ import org.jetbrains.kotlin.fir.analysis.checkers.toRegularClassSymbol
 import org.jetbrains.kotlin.fir.analysis.diagnostics.*
 import org.jetbrains.kotlin.fir.declarations.*
 import org.jetbrains.kotlin.fir.declarations.utils.*
+import org.jetbrains.kotlin.fir.expressions.toResolvedCallableReference
+import org.jetbrains.kotlin.fir.expressions.toResolvedCallableSymbol
 import org.jetbrains.kotlin.fir.resolve.fullyExpandedType
 import org.jetbrains.kotlin.fir.resolve.lookupSuperTypes
 import org.jetbrains.kotlin.fir.symbols.impl.FirConstructorSymbol
@@ -95,6 +98,12 @@ object FirInlineClassDeclarationChecker : FirRegularClassChecker() {
                 }
                 is FirField -> {
                     if (innerDeclaration.isSynthetic) {
+                        val symbol = innerDeclaration.initializer?.toResolvedCallableSymbol()
+                        if (context.languageVersionSettings.supportsFeature(LanguageFeature.InlineClassImplementationByDelegation) &&
+                            symbol != null && symbol == primaryConstructorParameter?.symbol
+                        ) {
+                            continue
+                        }
                         val delegatedTypeRefSource = (innerDeclaration.returnTypeRef as FirResolvedTypeRef).delegatedTypeRef?.source
                         withSuppressedDiagnostics(innerDeclaration, context) { context ->
                             reporter.reportOn(

compiler/testData/codegen/box/inlineClasses/delegationByUnderlyingType/default.kt

@@ -1,7 +1,6 @@
 // WITH_STDLIB
 // IGNORE_LIGHT_ANALYSIS
 // IGNORE_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // LANGUAGE: +InlineClassImplementationByDelegation
 
 interface I {

compiler/testData/codegen/box/inlineClasses/delegationByUnderlyingType/defaultArgument.kt

@@ -1,7 +1,6 @@
 // WITH_STDLIB
 // IGNORE_LIGHT_ANALYSIS
 // IGNORE_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // LANGUAGE: +InlineClassImplementationByDelegation
 
 interface I {

compiler/testData/codegen/box/inlineClasses/delegationByUnderlyingType/simple.kt

@@ -1,7 +1,6 @@
 // WITH_STDLIB
 // IGNORE_LIGHT_ANALYSIS
 // IGNORE_BACKEND: JVM
-// IGNORE_BACKEND_FIR: JVM_IR
 // LANGUAGE: +InlineClassImplementationByDelegation
 
 interface I {

compiler/testData/diagnostics/tests/inlineClasses/inlineClassCanImplementInterfaceByDelegation.fir.kt

@@ -9,10 +9,10 @@ class CFoo : IFoo
 
 val c = CFoo()
 
-inline class Test1(val x: Any) : <!VALUE_CLASS_CANNOT_IMPLEMENT_INTERFACE_BY_DELEGATION!>IFoo by FooImpl<!>
+inline class Test1(val x: Any) : <!VALUE_CLASS_CANNOT_IMPLEMENT_INTERFACE_BY_DELEGATION!>IFoo<!> by FooImpl
 
-inline class Test2(val x: IFoo) : <!VALUE_CLASS_CANNOT_IMPLEMENT_INTERFACE_BY_DELEGATION!>IFoo by x<!>
+inline class Test2(val x: IFoo) : IFoo by x
 
-inline class Test3(val x: IFoo) : <!VALUE_CLASS_CANNOT_IMPLEMENT_INTERFACE_BY_DELEGATION!>IFoo by CFoo()<!>
+inline class Test3(val x: IFoo) : <!VALUE_CLASS_CANNOT_IMPLEMENT_INTERFACE_BY_DELEGATION!>IFoo<!> by CFoo()
 
-inline class Test4(val x: IFoo) : <!VALUE_CLASS_CANNOT_IMPLEMENT_INTERFACE_BY_DELEGATION!>IFoo by c<!>
+inline class Test4(val x: IFoo) : <!VALUE_CLASS_CANNOT_IMPLEMENT_INTERFACE_BY_DELEGATION!>IFoo<!> by c