Revert "Remove search.digitalgov.gov and support.digitalgov.gov records"

[MyNameIsMissing]

Requesting to revert the previous PR as it accidentally removed entries that were still in use by our Search.gov customers and part so f our internal system. We will research and submit an more refined PR similar to 656 in the near future once we better understand all the ramifications.

Please contact me: Robert.Fink@GSA.gov (Contractor) or jim.kreft@gsa.gov (Gov) with questions or concerns.

• [ ] This is a new public-facing site (if so, please follow the additional instructions below)
  • [ ] Provide context
  • [ ] Assign to @18F/osc for review
  • [ ] TTS Digital Council's new site review process completed
  • [ ] Update the inventory with new site information

[MyNameIsMissing]

Closed due to duplicate submitted by Paul https://github.com/18F/dns/pull/657