Refactor typeWithStarProjections() so it uses FirClassSymbol instead of FirClass

It removes necessity to access .fir in plugins

compiler/fir/providers/src/org/jetbrains/kotlin/fir/FirVisibilityChecker.kt

@@ -356,7 +356,7 @@ abstract class FirVisibilityChecker : FirSessionComponent {
             stubTypesEqualToAnything = false
         )
         if (AbstractTypeChecker.isSubtypeOf(
-                typeCheckerState, dispatchReceiverType.fullyExpandedType(session), containingUseSiteClass.typeWithStarProjections()
+                typeCheckerState, dispatchReceiverType.fullyExpandedType(session), containingUseSiteClass.symbol.typeWithStarProjections()
             )
         ) {
             return true

compiler/fir/providers/src/org/jetbrains/kotlin/fir/resolve/ScopeUtils.kt

@@ -119,10 +119,10 @@ fun ClassId.defaultType(parameters: List<FirTypeParameterSymbol>): ConeClassLike
         isNullable = false,
     )
 
-fun FirClass.typeWithStarProjections(): ConeClassLikeType =
+fun FirClassSymbol<*>.typeWithStarProjections(): ConeClassLikeType =
     ConeClassLikeTypeImpl(
-        symbol.toLookupTag(),
-        typeParameters.map { ConeStarProjection }.toTypedArray(),
+        this.toLookupTag(),
+        typeParameterSymbols.map { ConeStarProjection }.toTypedArray(),
         isNullable = false
     )
 

plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/fir/SerializationFirResolveExtension.kt

@@ -260,8 +260,7 @@ class SerializationFirResolveExtension(session: FirSession) : FirDeclarationGene
             })
 
             superTypeRefs += buildResolvedTypeRef {
-                @OptIn(SymbolInternals::class)
-                type = generatedSerializerClassId.constructClassLikeType(arrayOf(owner.fir.typeWithStarProjections()), isNullable = false)
+                type = generatedSerializerClassId.constructClassLikeType(arrayOf(owner.typeWithStarProjections()), isNullable = false)
             }
         }
         // TODO: add typed constructor