perf: Reduce exceptions of APIPage deserialization

[filzrev]

This PR intended to fix #9973.

On current implementation.
APIPage deserialization internally throw a lot of exception internally.
And when the debugger is attached, this will cause performance slow down significantly.

So I've added IsDeserializableType method that check following context.

1. Utf8JsonReader information
   1.1. Current JsonTokenType
   1.2. Prefetched first PropertyName of JSON object. (e.g. h1/api1/facts)
2. Expected type that to be deserialized by JsonSerializer.
3. Expected type that to be converted by JsonConverter.

And skip deserialization if current context is not valid three pairs combinations.

Additionally, when unknown combination found. (It will be happens when APIPage's schema is updated)
IsDeserializableType method returns true.
And fallback to default behavior (Try to deserialize and catch exception)
So it works without problems for future updates.