Infer `RequiresSerializerAttribute` from `ICacheSerializer` in the constructor arguments

[ndrwrbgs]

Since having that argument means the handle requires a serializer for sure (rather than if it, say, read from the configuration), we could provide the same error visibility for handles that miss the attribute just by checking the arguments on the ctor.

https://github.com/maldworth/CacheManager.FileCaching/issues/5