feat: Add OTP authenticator support

[cbaker6]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Approach

TODOs before merging

• Add tests
• Add entry to changelog
• Add changes to documentation (guides, repository pages, in-code descriptions)

[cbaker6]

@dblythy I still needs to do a little work on this and test it, but let me know what you think. I won't be for sure without testing, but from parse-community/parse-server#8661 it looks like you might be sending authData.mfa?.pending (I see a check for it in spec/AuthenticationAdapters.spec.js) to the client and it's sent as an object. If this is true, it will break strongly typed SDKs. I might able to add a workaround via Cloud Code that will delete pending before sending the user back to the client. Let me know what you think.