Replace index with id in actions routes (#36842)

This PR migrates the web Actions run/job routes from index-based
`runIndex` or `jobIndex` to database IDs.

**⚠️ BREAKING ⚠️**: Existing saved links/bookmarks that use the old
index-based URLs will no longer resolve after this change.

Improvements of this change:
- Previously, `jobIndex` depended on list order, making it hard to
locate a specific job. Using `jobID` provides stable addressing.
- Web routes now align with API, which already use IDs.
- Behavior is closer to GitHub, which exposes run/job IDs in URLs.
- Provides a cleaner base for future features without relying on list
order.
- #36388 this PR improves the support for reusable workflows. If a job
uses a reusable workflow, it may contain multiple child jobs, which
makes relying on job index to locate a job much more complicated

---------

Signed-off-by: Zettat123 <zettat123@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

models/actions/run.go

@@ -70,14 +70,14 @@ func (run *ActionRun) HTMLURL() string {
 	if run.Repo == nil {
 		return ""
 	}
-	return fmt.Sprintf("%s/actions/runs/%d", run.Repo.HTMLURL(), run.Index)
+	return fmt.Sprintf("%s/actions/runs/%d", run.Repo.HTMLURL(), run.ID)
 }
 
 func (run *ActionRun) Link() string {
 	if run.Repo == nil {
 		return ""
 	}
-	return fmt.Sprintf("%s/actions/runs/%d", run.Repo.Link(), run.Index)
+	return fmt.Sprintf("%s/actions/runs/%d", run.Repo.Link(), run.ID)
 }
 
 func (run *ActionRun) WorkflowLink() string {
@@ -299,7 +299,7 @@ func CancelJobs(ctx context.Context, jobs []*ActionRunJob) ([]*ActionRunJob, err
 		if err := StopTask(ctx, job.TaskID, StatusCancelled); err != nil {
 			return cancelledJobs, err
 		}
-		updatedJob, err := GetRunJobByID(ctx, job.ID)
+		updatedJob, err := GetRunJobByRunAndID(ctx, job.RunID, job.ID)
 		if err != nil {
 			return cancelledJobs, fmt.Errorf("get job: %w", err)
 		}