Update DevOps Adoption empty state illustration

What does this MR do and why?

Update DevOps Adoption empty state illustration

Old illustrations will be removed here -> gitlab-svgs!1047 (merged)

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Open ee/app/assets/javascripts/analytics/devops_reports/devops_adoption/components/devops_adoption_section.vue
2. Comment everything inside template except devops-adoption-empty-state
3. Visit http://gdk.test:3000/groups/group-2/-/analytics/devops_adoption?tab=dev

#425467 (closed)