[FIR] Move common members in symbols up in the hierarchy

compiler/fir/checkers/src/org/jetbrains/kotlin/fir/analysis/checkers/FirHelpers.kt

@@ -551,8 +551,7 @@ val FirClassLikeSymbol<*>.classKind: ClassKind?
 val FirBasedSymbol<*>.typeParameterSymbols: List<FirTypeParameterSymbol>?
     get() = when (this) {
         is FirCallableSymbol<*> -> typeParameterSymbols
-        is FirClassSymbol<*> -> typeParameterSymbols
-        is FirTypeAliasSymbol -> typeParameterSymbols
+        is FirClassLikeSymbol<*> -> typeParameterSymbols
         else -> null
     }
 

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/enhancement/SignatureEnhancement.kt

@@ -475,7 +475,7 @@ class FirSignatureEnhancement(
             ?: FakePureImplementationsProvider.getPurelyImplementedInterface(owner.symbol.classId)
             ?: return null
         val superTypeSymbol = session.symbolProvider.getClassLikeSymbolByClassId(purelyImplementedClassId) ?: return null
-        val superTypeParameterSymbols = superTypeSymbol.typeParameterSymbols ?: return null
+        val superTypeParameterSymbols = superTypeSymbol.typeParameterSymbols
         val typeParameters = owner.typeParameters
         val supertypeParameterCount = superTypeParameterSymbols.size
         val typeParameterCount = typeParameters.size
@@ -495,8 +495,7 @@ class FirSignatureEnhancement(
         )
     }
 
-
-        private fun enhanceSuperType(type: FirTypeRef): FirTypeRef =
+    private fun enhanceSuperType(type: FirTypeRef): FirTypeRef =
         EnhancementSignatureParts(
             session, typeQualifierResolver, null, isCovariant = false, forceOnlyHeadTypeConstructor = false,
             AnnotationQualifierApplicabilityType.TYPE_USE, contextQualifiers

compiler/fir/tree/src/org/jetbrains/kotlin/fir/symbols/impl/FirClassLikeSymbol.kt

@@ -33,6 +33,17 @@ sealed class FirClassLikeSymbol<D : FirClassLikeDeclaration>(
     val rawStatus: FirDeclarationStatus
         get() = fir.status
 
+    val resolvedStatus: FirResolvedDeclarationStatus
+        get() {
+            lazyResolveToPhase(FirResolvePhase.STATUS)
+            return fir.status as FirResolvedDeclarationStatus
+        }
+
+    val typeParameterSymbols: List<FirTypeParameterSymbol>
+        get() {
+            return fir.typeParameters.map { it.symbol }
+        }
+
     override fun toString(): String = "${this::class.simpleName} ${classId.asString()}"
 }
 
@@ -58,19 +69,8 @@ sealed class FirClassSymbol<C : FirClass>(classId: ClassId) : FirClassLikeSymbol
             return fir.declarations.map { it.symbol }
         }
 
-    val typeParameterSymbols: List<FirTypeParameterSymbol>
-        get() {
-            return fir.typeParameters.map { it.symbol }
-        }
-
     val classKind: ClassKind
         get() = fir.classKind
-
-    val resolvedStatus: FirResolvedDeclarationStatus
-        get() {
-            lazyResolveToPhase(FirResolvePhase.STATUS)
-            return fir.status as FirResolvedDeclarationStatus
-        }
 }
 
 class FirRegularClassSymbol(classId: ClassId) : FirClassSymbol<FirRegularClass>(classId) {
@@ -91,20 +91,9 @@ class FirAnonymousObjectSymbol : FirClassSymbol<FirAnonymousObject>(ANONYMOUS_CL
 class FirTypeAliasSymbol(classId: ClassId) : FirClassLikeSymbol<FirTypeAlias>(classId) {
     override fun toLookupTag(): ConeClassLikeLookupTag = ConeClassLikeLookupTagImpl(classId)
 
-    val resolvedStatus: FirResolvedDeclarationStatus
-        get() {
-            lazyResolveToPhase(FirResolvePhase.STATUS)
-            return fir.status as FirResolvedDeclarationStatus
-        }
-
     val resolvedExpandedTypeRef: FirResolvedTypeRef
         get() {
             lazyResolveToPhase(FirResolvePhase.SUPER_TYPES)
             return fir.expandedTypeRef as FirResolvedTypeRef
         }
-
-    val typeParameterSymbols: List<FirTypeParameterSymbol>
-        get() {
-            return fir.typeParameters.map { it.symbol }
-        }
 }