[Blazor] Implement property analyzer also for [PersistentState]

[javiercn]

The same rules that govern [SupplyParameterFromForm] apply to [PersistentState]. Properties declared with it shouldn't use an initializer that does not initialize to the default value.

aspnetcore/src/Components/Analyzers/src/SupplyParameterFromFormAnalyzer.cs

Lines 15 to 83 in e336a0b

	[DiagnosticAnalyzer(LanguageNames.CSharp)]
	public sealed class SupplyParameterFromFormAnalyzer : DiagnosticAnalyzer
	{
	public SupplyParameterFromFormAnalyzer()
	{
	SupportedDiagnostics = ImmutableArray.Create(
	DiagnosticDescriptors.SupplyParameterFromFormShouldNotHavePropertyInitializer);
	}
	public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics { get; }
	public override void Initialize(AnalysisContext context)
	{
	context.EnableConcurrentExecution();
	context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.ReportDiagnostics);
	context.RegisterCompilationStartAction(context =>
	{
	if (!ComponentSymbols.TryCreate(context.Compilation, out var symbols))
	{
	// Types we need are not defined.
	return;
	}
	context.RegisterSyntaxNodeAction(context =>
	{
	var propertyDeclaration = (PropertyDeclarationSyntax)context.Node;
	// Check if property has an initializer
	if (propertyDeclaration.Initializer == null)
	{
	return;
	}
	// Ignore initializers that set to default values (null, default, etc.)
	if (IsDefaultValueInitializer(propertyDeclaration.Initializer.Value))
	{
	return;
	}
	var propertySymbol = context.SemanticModel.GetDeclaredSymbol(propertyDeclaration);
	if (propertySymbol == null)
	{
	return;
	}
	// Check if property has [SupplyParameterFromForm] attribute
	if (!ComponentFacts.IsSupplyParameterFromForm(symbols, propertySymbol))
	{
	return;
	}
	// Check if the containing type inherits from ComponentBase
	var containingType = propertySymbol.ContainingType;
	if (!ComponentFacts.IsComponentBase(symbols, containingType))
	{
	return;
	}
	var propertyLocation = propertySymbol.Locations.FirstOrDefault();
	if (propertyLocation != null)
	{
	context.ReportDiagnostic(Diagnostic.Create(
	DiagnosticDescriptors.SupplyParameterFromFormShouldNotHavePropertyInitializer,
	propertyLocation,
	propertySymbol.ToDisplayString(SymbolDisplayFormat.CSharpErrorMessageFormat)));
	}
	}, SyntaxKind.PropertyDeclaration);
	});
	}