Resolve "Translation update for /solutions/code-suggestions/"

Step 1: What is changing in this MR?

• Enabled contentful localization for code suggestions page

Production	Review app (FR)	Review App (DE)	Review app (JP)
https://about.gitlab.com/solutions/code-suggestions/	https://3730-translation-update-for-solutions-code-suggestions.about.gitlab-review.app/fr-fr/solutions/code-suggestions/	https://3730-translation-update-for-solutions-code-suggestions.about.gitlab-review.app/de-de/solutions/code-suggestions/	https://3730-translation-update-for-solutions-code-suggestions.about.gitlab-review.app/ja-jp/solutions/code-suggestions/

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.

Build Variables:

• Use Contentful Preview API

Closes #3730 (closed)