Rename run group side bar to Re-executions instead of the job name (#…

…26359)

## Summary & Motivation
During dogfooding of some changes to retry logic, @anuthebananu pointed
out that the title for the lineage of retried runs was a bit confusing.
It's currently the name of the job, which for asset jobs leaks the
internal `__ASSET_JOB` name
<img width="630" alt="Screenshot 2024-12-09 at 3 01 30 PM"
src="https://github.com/user-attachments/assets/8f5841b8-9ea7-4a14-93ec-d373dc8d56a8">

This PR renames it `Re-executions`. 
<img width="572" alt="Screenshot 2024-12-12 at 11 28 57 AM"
src="https://github.com/user-attachments/assets/43feabc3-febe-4573-8b33-9299c722bf4e"
/>


## How I Tested These Changes

## Changelog

Renamed the run lineage sidebar on the Run details page to
`Re-executions`.

js_modules/dagster-ui/packages/ui-core/src/gantt/RunGroupPanel.tsx

@@ -96,7 +96,7 @@ export const RunGroupPanel = ({
   });
 
   return (
-    <SidebarSection title={runs[0] ? `${runs[0].pipelineName} (${runs.length})` : ''}>
+    <SidebarSection title={runs[0] ? `Re-executions (${runs.length - 1})` : ''}>
       <>
         {runs.map((g, idx) =>
           g ? (