Value classes: Add isValue property to class descriptors

Reuse isInline flag in proto and IR.
Check metadata version on deserialization.

compiler/frontend/src/org/jetbrains/kotlin/psi/synthetics/SyntheticClassOrObjectDescriptor.kt

@@ -83,6 +83,7 @@ class SyntheticClassOrObjectDescriptor(
     override fun isExpect() = false
     override fun isActual() = false
     override fun isFun() = false
+    override fun isValue() = false
 
     override fun getCompanionObjectDescriptor(): ClassDescriptorWithResolutionScopes? = null
     override fun getTypeConstructor(): TypeConstructor = typeConstructor

compiler/frontend/src/org/jetbrains/kotlin/resolve/lazy/descriptors/LazyClassDescriptor.java

@@ -87,6 +87,7 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
     private final boolean isExpect;
     private final boolean isActual;
     private final boolean isFun;
+    private final boolean isValue;
 
     private final Annotations annotations;
     private final Annotations danglingAnnotations;
@@ -160,6 +161,7 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
                         containingDeclaration instanceof ClassDescriptor && ((ClassDescriptor) containingDeclaration).isExpect();
 
         this.isFun = modifierList != null && PsiUtilsKt.hasFunModifier(modifierList);
+        this.isValue = modifierList != null && PsiUtilsKt.hasValueModifier(modifierList);
 
         // Annotation entries are taken from both own annotations (if any) and object literal annotations (if any)
         List<KtAnnotationEntry> annotationEntries = new ArrayList<>();
@@ -552,6 +554,11 @@ public class LazyClassDescriptor extends ClassDescriptorBase implements ClassDes
         return isFun;
     }
 
+    @Override
+    public boolean isValue() {
+        return isValue;
+    }
+
     @NotNull
     @Override
     public Annotations getAnnotations() {