Support annotations on class type parameters

#KT-43714

core/descriptors.jvm/src/org/jetbrains/kotlin/load/java/lazy/descriptors/LazyJavaTypeParameterDescriptor.kt

@@ -36,13 +36,14 @@ class LazyJavaTypeParameterDescriptor(
 ) : AbstractLazyTypeParameterDescriptor(
     c.storageManager,
     containingDeclaration,
+    LazyJavaAnnotations(c, javaTypeParameter),
     javaTypeParameter.name,
     Variance.INVARIANT,
-    /* isReified = */ false,
+    /* isReified = */
+    false,
     index,
-    SourceElement.NO_SOURCE, c.components.supertypeLoopChecker
+    SourceElement.NO_SOURCE, c.components.supertypeLoopChecker,
 ) {
-    override val annotations = LazyJavaAnnotations(c, javaTypeParameter)
 
     override fun resolveUpperBounds(): List<KotlinType> {
         return computeNotEnhancedBounds()

core/descriptors/src/org/jetbrains/kotlin/descriptors/impl/AbstractLazyTypeParameterDescriptor.java

@@ -29,6 +29,7 @@ public abstract class AbstractLazyTypeParameterDescriptor extends AbstractTypePa
     public AbstractLazyTypeParameterDescriptor(
             @NotNull StorageManager storageManager,
             @NotNull DeclarationDescriptor containingDeclaration,
+            @NotNull Annotations annotations,
             @NotNull Name name,
             @NotNull Variance variance,
             boolean isReified,
@@ -36,7 +37,7 @@ public abstract class AbstractLazyTypeParameterDescriptor extends AbstractTypePa
             @NotNull SourceElement source,
             @NotNull SupertypeLoopChecker supertypeLoopChecker
     ) {
-        super(storageManager, containingDeclaration, Annotations.Companion.getEMPTY() /* TODO */, name, variance, isReified, index, source,
+        super(storageManager, containingDeclaration, annotations, name, variance, isReified, index, source,
               supertypeLoopChecker);
     }
 

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/descriptors/DeserializedTypeParameterDescriptor.kt

@@ -18,6 +18,7 @@ package org.jetbrains.kotlin.serialization.deserialization.descriptors
 
 import org.jetbrains.kotlin.descriptors.SourceElement
 import org.jetbrains.kotlin.descriptors.SupertypeLoopChecker
+import org.jetbrains.kotlin.descriptors.annotations.Annotations
 import org.jetbrains.kotlin.descriptors.impl.AbstractLazyTypeParameterDescriptor
 import org.jetbrains.kotlin.metadata.ProtoBuf
 import org.jetbrains.kotlin.metadata.deserialization.upperBounds
@@ -32,8 +33,11 @@ class DeserializedTypeParameterDescriptor(
     val proto: ProtoBuf.TypeParameter,
     index: Int
 ) : AbstractLazyTypeParameterDescriptor(
-    c.storageManager, c.containingDeclaration, c.nameResolver.getName(proto.name),
-    ProtoEnumFlags.variance(proto.variance), proto.reified, index, SourceElement.NO_SOURCE, SupertypeLoopChecker.EMPTY
+    c.storageManager, c.containingDeclaration,
+    /*TODO: support deserialized type annotations: now they are unused, even not accessible via reflection (KT-46932)*/
+    Annotations.EMPTY,
+    c.nameResolver.getName(proto.name),
+    ProtoEnumFlags.variance(proto.variance), proto.reified, index, SourceElement.NO_SOURCE, SupertypeLoopChecker.EMPTY,
 ) {
     override val annotations = DeserializedAnnotations(c.storageManager) {
         c.components.annotationAndConstantLoader.loadTypeParameterAnnotations(proto, c.nameResolver).toList()