UX: show disclaimer on account creation unconditionally

[awesomerobot]

At the moment this won't appear if tos_url and privacy_policy_url are undefined... I don't believe these settings are serialized in the case of login_required, so the disclaimer will never appear:

https://meta.discourse.org/t/terms-of-service-privacy-policy-agreement-notice-missing-when-forum-log-in-is-forced/305744

When these settings are set, /tos and /privacy redirect to the setting URL... so maybe we don't need the check at all here?

The one case this isn't cover is when the default TOS and Privacy Policy aren't generated, which can happen if a company name isn't added to the site setup wizard. Though I wonder if the broken state is more desirable to bring an admin's attention to this issue 🤔

Very possible this is more complicated... so feel free to close if this is an oversimplification.

[discoursebot]

This pull request has been mentioned on Discourse Meta. There might be relevant details there:

https://meta.discourse.org/t/terms-of-service-privacy-policy-agreement-notice-missing-when-forum-log-in-is-forced/305744/4