[FIR JS] Support WRONG_MULTIPLE_INHERITANCE

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDataClassConverters.kt

@@ -598,6 +598,13 @@ internal val KT_DIAGNOSTIC_CONVERTER = KtDiagnosticConverterBuilder.buildConvert
             token,
         )
     }
+    add(FirJsErrors.WRONG_MULTIPLE_INHERITANCE) { firDiagnostic ->
+        WrongMultipleInheritanceImpl(
+            firSymbolBuilder.callableBuilder.buildCallableSymbol(firDiagnostic.a),
+            firDiagnostic as KtPsiDiagnostic,
+            token,
+        )
+    }
     add(FirErrors.CONSTRUCTOR_IN_OBJECT) { firDiagnostic ->
         ConstructorInObjectImpl(
             firDiagnostic as KtPsiDiagnostic,

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnostics.kt

@@ -447,6 +447,11 @@ sealed class KtFirDiagnostic<PSI : PsiElement> : KtDiagnosticWithPsi<PSI> {
         abstract val candidates: List<KtType>
     }
 
+    abstract class WrongMultipleInheritance : KtFirDiagnostic<KtElement>() {
+        override val diagnosticClass get() = WrongMultipleInheritance::class
+        abstract val symbol: KtCallableSymbol
+    }
+
     abstract class ConstructorInObject : KtFirDiagnostic<KtDeclaration>() {
         override val diagnosticClass get() = ConstructorInObject::class
     }

analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/diagnostics/KtFirDiagnosticsImpl.kt

@@ -527,6 +527,12 @@ internal class AmbiguousSuperImpl(
     override val token: KtLifetimeToken,
 ) : KtFirDiagnostic.AmbiguousSuper(), KtAbstractFirDiagnostic<KtSuperExpression>
 
+internal class WrongMultipleInheritanceImpl(
+    override val symbol: KtCallableSymbol,
+    override val firDiagnostic: KtPsiDiagnostic,
+    override val token: KtLifetimeToken,
+) : KtFirDiagnostic.WrongMultipleInheritance(), KtAbstractFirDiagnostic<KtElement>
+
 internal class ConstructorInObjectImpl(
     override val firDiagnostic: KtPsiDiagnostic,
     override val token: KtLifetimeToken,