Revert "Merge branch 'add-dei-badge-image' into 'master'"

What does this MR do and why?

This MR reverts !142859 (merged) to resolve the broken master (gitlab-org/quality/engineering-productivity/master-broken-incidents#5078 (closed)) issue due to spec failure in spec/lib/gitlab/path_regex_spec.rb.

Revert "Merge branch 'add-dei-badge-image' into 'master'"

This reverts merge request !142859 (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.

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Before	After

How to set up and validate locally

Running the following series of specs (i suspect it can be shorter but i've not narrowed it down yet) will fail on master but pass on this MR:

bin/rspec spec/services/merge_requests/update_service_spec.rb spec/services/ci/create_pipeline_service_spec.rb spec/services/ci/register_job_service_spec.rb spec/services/merge_requests/merge_service_spec.rb spec/lib/gitlab/background_migration/backfill_project_wiki_repositories_spec.rb spec/lib/gitlab/github_import/importer/protected_branch_importer_spec.rb spec/lib/gitlab/user_access_spec.rb spec/models/operations/feature_flags/strategy_spec.rb spec/lib/gitlab/auth/auth_finders_spec.rb spec/services/ci/job_artifacts/destroy_all_expired_service_spec.rb spec/models/concerns/avatarable_spec.rb spec/services/merge_requests/reopen_service_spec.rb spec/helpers/groups_helper_spec.rb spec/lib/gitlab/path_regex_spec.rb