Draft: Resolve "[ENG] [Bug... or kind of] Fix duplicated ID's, solve FAQ routing"

Step 1: What is changing in this MR?

Production	Review app
https://about.gitlab.com/pricing	WIP

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/	WIP
https://about.gitlab.com/pricing/	WIP
https://about.gitlab.com/ja-jp/pricing/	WIP

Closes #3858