[libc++] Rename workflow that restarts preempted jobs

All the libc++ workflows start with `libcxx-`, so use that prefix for
this job as well. Also, remove trailing whitespace from the yaml file.

Author: ldionne

.github/workflows/restart-preempted-libcxx-jobs.yaml renamed to .github/workflows/libcxx-restart-preempted-jobs.yaml

@@ -34,7 +34,7 @@ jobs:
           script: |
             const failure_regex = /Process completed with exit code 1./
             const preemption_regex = /The runner has received a shutdown signal/
-            
+
             const wf_run = context.payload.workflow_run
             core.notice(`Running on "${wf_run.display_title}" by @${wf_run.actor.login} (event: ${wf_run.event})\nWorkflow run URL: ${wf_run.html_url}`)
 
@@ -80,30 +80,30 @@ jobs:
               }
               check_run_ids.push(check_run.id);
             }
-            
+
             has_preempted_job = false;
 
             for (check_run_id of check_run_ids) {
               console.log('Listing annotations for check run: ' + check_run_id);
-                 
+
               annotations = await github.rest.checks.listAnnotations({
                 owner: context.repo.owner,
                 repo: context.repo.repo,
                 check_run_id: check_run_id
               })
-              
+
               for (annotation of annotations.data) {
                 if (annotation.annotation_level != 'failure') {
                   continue;
                 }
-                
+
                 const preemption_match = annotation.message.match(preemption_regex);
-              
+
                 if (preemption_match != null) {
                   console.log('Found preemption message: ' + annotation.message);
                   has_preempted_job = true;
                 }
-                
+
                 const failure_match = annotation.message.match(failure_regex);
                 if (failure_match != null) {
                   // We only want to restart the workflow if all of the failures were due to preemption.
@@ -115,20 +115,18 @@ jobs:
                   return;
                 }
               }
-            } 
-             
+            }
+
             if (!has_preempted_job) {
               core.notice('No preempted jobs found. Not restarting workflow.');
               await create_check_run('neutral', 'No preempted jobs found. Not restarting workflow.')
               return;
             }
-            
+
             core.notice("Restarted workflow: " + context.payload.workflow_run.id);
             await github.rest.actions.reRunWorkflowFailedJobs({
                 owner: context.repo.owner,
                 repo: context.repo.repo,
                 run_id: context.payload.workflow_run.id
               })
             await create_check_run('success', 'Restarted workflow run due to preempted job')
-            
-