Make BackedUpItems thread safe

[anshulahuja98]

Describe the problem/challenge you have

Tracking issue to make BackedUpItems thread safe.

Describe the solution you'd like

If we wish to achieve any level of concurrency across backup operations or restore operations, we need to make sure all of the intermediate trackers which are used are thread safe such that they don't run into concurrency issue.

Similar to the impl of SkippedPvTracker -

velero/pkg/backup/pv_skip_tracker.go

Line 43 in a9e80d5

func NewSkipPVTracker() *skipPVTracker {

We need to implement BackupUpItems tracker
https://github.com/vmware-tanzu/velero/blob/5d81317d5e0c4efc91e76cdbaad56ce21eed2456/pkg/backup/item_backupper.go#L170C1-L171C63
with mutex lock such that multiple operations can update the status in parallel without concurrency issues.
Setting ground work for: #6165 | #6860

Anything else you would like to add:

Environment:

• Velero version (use velero version):
• Kubernetes version (use kubectl version):
• Kubernetes installer & version:
• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release):

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[reasonerjt]

@anshulahuja98 I know we had some discussion but could you add more details in this issue to make it more self-contained?

[anshulahuja98]

Updated the issue description.
@reasonerjt we can mark this as backlog for now, we don't need to track in 1.14
I'll meanwhile try to get someone from my team to work on this.

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 14 days. If a Velero team member has requested log or more information, please provide the output of the shared commands.

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 14 days. If a Velero team member has requested log or more information, please provide the output of the shared commands.

[github-actions]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 14 days. If a Velero team member has requested log or more information, please provide the output of the shared commands.

[sseago]

Reassigning to myself since this is needed for #8334