Replace DNS Record status UI/logic

[humphd]

The work in #396 is going to make it hard for us to continue with our DNS Record status UI and logic. Instead, we're going to move to a world where we write to the database and then "reconcile" what is on Route53 in bulk--we won't update the status of individual records, since the database will be our source of truth. As a result, we should fix our UI so that users can still get some info on whether or not their DNS record is fully propagated.

There are a few ways we could do this:

1. Write a Resource Route in Remix that allows us to send a list of domains, and it tries to resolve them server-side, and reports back with whether or not it worked for each one. This is nice because we control it; however, it's also only reporting back what our server can reach vs. what's happening globally (DNS is distributed around the globe!)
2. Add a button that links users to an external site, and let it do this for us. For example, I made a domain on staging, and you can test it at https://dnschecker.org/#A/foo.davidhumphrey.stage.mystudentproject.ca or https://www.nslookup.io/domains/foo.davidhumphrey.stage.mystudentproject.ca/dns-propagation/a/. These sites (there are others, I just picked 2) let you construct a URL and have it do the queries for you using lots of DNS servers around the world. This is nice because it gives a better picture of what's happening across many DNS servers.

[humphd]

We also need to allow edit/delete/renew all the time (i.e., we won't have to block on the state of the record).

[Myrfion]

1. Add UI link that takes to URL for DNS record status in the new tab
2. Remove DNS record status
3. Add instructions that will educate people on what DNS record status means Dedicated Page for DNS-Records Information #443

[humphd]

We haven't finished this yet.

Another UI tool is https://www.digitalocean.com/community/tools/dns or https://toolbox.googleapps.com/apps/dig