[Blazor] Avoid creating a cache dictionary per instance on PersistentStateValueProvider

[javiercn]

8883b98#diff-a73707ae2d4739dc65b31a7695ac79c3f9d2d967240ceeb210bd364f92ce1fc0R22

[javiercn]

private readonly ConcurrentDictionary<Type, IPersistentComponentStateSerializer?> _serializerCache = new();

in src/Components/Components/src/PersistentStateValueProvider.cs

Should be static readonly