fix: Platform page: Update hero image

Build Variables:

• Use Contentful Preview API

Step 1: What is changing in this MR?

MR for reviewing update to DevOps Lifecycle asset in Contentful: https://app.contentful.com/spaces/xz1dnu24egyd/entries/asset:2S16xLgZGnBkxXgFVQOrxv?previousEntries=7wmV7IqLcRZjUddW3YpEqb&focusedField=file&focusedLocale=en-US

This MR also swaps out the image that exists in our codebase.

Production	Review app
https://about.gitlab.com/platform	https://3880-eng-platform-page-update-hero-image.about.gitlab-review.app/platform/
https://about.gitlab.com/solutions/devops-platform	https://3880-eng-platform-page-update-hero-image.about.gitlab-review.app/solutions/devops-platform/

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/ja-jp/	WIP
https://about.gitlab.com/pricing/	WIP
https://about.gitlab.com/ja-jp/pricing/	WIP
https://about.gitlab.com/sales/	WIP
https://about.gitlab.com/gitlab-duo/	WIP
https://about.gitlab.com/enterprise/	WIP
https://about.gitlab.com/platform/	WIP
https://about.gitlab.com/free-trial/	WIP

Closes #3880 (closed)