Add CRA banners to security and certs pages

[britneywwc]

Go live date June 3rd

Done

• Add CRA banners to /security and /security/certification pages

QA

• Go to demos for /security, check that changes are updated as per copy docs
• Go to demos for /security/certification, check that changes are updated as per copy docs

Issue / Card

Fixes WD-11271

Screenshots

[If relevant, please include a screenshot.]

Help

QA steps - Commit guidelines

[webteam-app]

Demo

Jenkins

demos.haus

[britneywwc]

Thanks for the review @anthonydillon , I've applied your suggested changes. Let me know if there's anything else I should address.

[anthonydillon]

Should there be such a large diff?

[britneywwc]

Should there be such a large diff?

The large diff is mostly from the file linting