Resolve "[ENG] $19 Premium Promotional Offering for SMBs"

Step 1: What is changing in this MR?

TO BE RELEASED MONDAY 9AM PST

Localization request

Figma

• Add Sticky Top prop to FAQ: https://stackoverflow.com/questions/42872002/in-vue-js-component-how-to-use-props-in-css
• Adjust other sticky elements on the page: they will need to be shifted to account for this new element
• Added slot to contact form wrapper component

Production	Review app
https://about.gitlab.com/pricing	https://3797-eng-19-premium-promotional-offering-for-smbs.about.gitlab-review.app/pricing
N/A	https://3797-eng-19-premium-promotional-offering-for-smbs.about.gitlab-review.app/pricing/smb-promo/

Step 2: Ensure that your changes comply with the following, where applicable:

• I, the Assignee, have run Axe tools on any updated pages, and fixed the relevant accessibility issues.
• These changes work on both Safari, Chrome, and Firefox.
• These changes have been reviewed for Visual Quality Assurance and Functional Quality Assurance on Mobile, Desktop, and Tablet.
• These changes work with our Google Analytics and SEO tools.
• These changes have been documented as expected.

Step 3: Ensure that your changes don't cause regressions on key pages, where applicable:

Production	Review app
https://about.gitlab.com/	https://3797-eng-19-premium-promotional-offering-for-smbs.about.gitlab-review.app/
https://about.gitlab.com/ja-jp/	https://3797-eng-19-premium-promotional-offering-for-smbs.about.gitlab-review.app/ja-jp/
https://about.gitlab.com/pricing/	https://3797-eng-19-premium-promotional-offering-for-smbs.about.gitlab-review.app/pricing/
https://about.gitlab.com/ja-jp/pricing/	https://3797-eng-19-premium-promotional-offering-for-smbs.about.gitlab-review.app/ja-jp/pricing/

Build Variables:

• Use Contentful Preview API

Closes #3797