Don't show contact information if it doesn't exist on checkout confirmation page

[Jujhaar]

On the confirmation page, there is a section for contact information containing both the email and phone number for a partner (code). Some of our partners don't provide one or the other, and this string should probably be modifiable in Airtable.

Easy fix: Only show email or phone number if they exist in the Airtable
Better fix: Make this string part of the modifiable content in Airtable.

cc @trip41 @sabrichu @thelarrywei