Add filter for notoptions after retrieval

[rebasaurus]

Since we are able to filter alloptions after retrieving them via alloptions (​https://github.com/WordPress/WordPress/blob/f0078d043e0f2805c2400bd5e869eb3533712eec/wp-includes/option.php#L270), it would be nice to do the same for notoptions. This would be great in the case where a developer would want to add a check to ensure that a certain value never ends up there.

Perhaps, this could live in a function similar to wp_load_alloptions(), potentially wp_load_notoptions()?