Injected header/footer: Publish to prod: ptsd.va.gov; mirecc.va.gov; mentalhealth.va.gov

[jilladams]

Description

Original request to set up new site for injected header/footer: #20329

Sites:
https://ptsd.va.gov/
https://www.mirecc.va.gov/
https://mentalhealth.va.gov/

This ticket adds new domain(s) to allowlists that gate the injected header. When the requesting team confirms their testing is complete, Public Websites will

• update proxy-rewrite-whitelist.json code to cookieOnly: false to permanently display the header

Acceptance Criteria

• Requesting team has signed off that they're ready to publish
• Devops PRs to add www & non-www domain(s) have merged with cookieOnly: false (which makes injection globally visible)
• On requested domain(s) the global header is injected on page load, with no manual cookie updates required

[jilladams]

@FranECross once #20329 is complete, we will hand off the sites to the owning teams to test and verify. When they give us the greenlight to ship changes to production, we'll need to pull this ticket in. It's a very small code change to flip true to false so I estimated at 2 points.