Fixed sanity test issue to account for homepage redesign

[dwnoble]

The sanity tests started failing after migrating the homepage to use emotion

• Added validation to run_website_sanity.sh to error gracefully if no $domain arg is passed in
• Allow setting the protocol along with $domain arg to allow testing from localhost
• Added data-testid attribute to LinkChip, LinkBox, and QueryLink element to allow test cases to select dom elements without a fixed class name
• Updated sanity.py test to use data-testid attribute to select elements

[gmechali]

Thanks for taking this on!

[keyurva]

Thanks for the fix, Dan!