Make DefaultOneTimeToken Serializable

[franticticktick]

Closes gh-16617

[jzheaux]

Hi, @franticticktick. Was there something released in 6.4 that is already Serializable that is using these components? If not, then this is a feature enhancement and should be on main. Adding functionality is a feature, while fixing existing incomplete or broken functionality is a bug.

The reason the other components are being updated on 6.4.x is because those components claim to be serializable, but they aren't for one reason or another. So, those need fixing on the earliest maintenance branch possible.

[franticticktick]

Hi @jzheaux thanks for the clarification. I came across several cases where developers tried to implement ReactiveOneTimeTokenService based on Redis. This is mainly due to the fact that we cannot yet make ReactiveOneTimeTokenService for a distributed environment. In addition, the ReactiveOneTimeTokenService implementation based on Redis looks convenient. If the OneTimeToken is not serializable, then such an implementation is impossible, although there is already a request for this. So I opened a ticket as a bug. Can I leave this ticket as is, but do a PR in main with backport in 6.4.x?