Merge branch '26278-shaking-tab-pipelines-view' into 'master'

Removes invalid html and unneeded CSS to prevent shaking in the pipelines tab

Closes #26278

See merge request !8411

app/views/projects/commit/_pipelines_list.haml

-%ul.content-list.pipelines
+%div
   - if pipelines.blank?
-    %li
+    %div
       .nothing-here-block No pipelines to show
   - else
     .table-holder

changelogs/unreleased/26278-shaking-tab-pipelines-view.yml

+---
+title: Removes invalid html and unneed CSS to prevent shaking in the pipelines tab
+merge_request: 8411
+author: