Rename issue triage workflow, remove legacy product auto-label action, and sync with main (#47911)

## Summary of the Pull Request

Renames the issue-triage GitHub Action to **Automatic Triaging on Issue
Creation** and removes the redundant `auto-label-product.yml` workflow.
This consolidates issue labeling/triage under a single workflow surface.

Also syncs this PR branch with the latest `main` via a merge commit to
keep it up to date with upstream.

## PR Checklist

- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

## Detailed Description of the Pull Request / Additional comments

- **Workflow rename**
  - Updated `.github/workflows/auto-label-issues.yml`:
- `name: Auto-label Issues by Area` → `name: Automatic Triaging on Issue
Creation`
- Updated the manual-trigger comment to reference the new action name.

- **Workflow cleanup**
- Removed `.github/workflows/auto-label-product.yml` to eliminate
overlapping automation.

- **Branch sync requested in PR comments**
- Merged latest `origin/main` into this branch (`4f831bc`) to keep the
PR current.

```yaml
# .github/workflows/auto-label-issues.yml
name: Automatic Triaging on Issue Creation
```

## Validation Steps Performed

- Verified clean merge of `origin/main` into this PR branch (no merge
conflicts).
- Confirmed targeted workflow changes remain present after merge.
- Ran PR validation tooling:
  - Code Review completed successfully.
  - CodeQL scan timed out in validation tooling.

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: niels9001 <9866362+niels9001@users.noreply.github.com>

Author: Copilot

.github/workflows/auto-label-issues.yml

@@ -1,9 +1,9 @@
-name: Auto-label Issues by Area
+name: Automatic Triaging on Issue Creation
 
 on:
   issues:
     types: [opened, reopened]
-  # Manual trigger: go to Actions → "Auto-label Issues by Area" → Run workflow.
+  # Manual trigger: go to Actions → "Automatic Triaging on Issue Creation" → Run workflow.
   # Enter one or more comma-separated issue numbers (e.g. "1234" or "1234,1235,1236")
   # to apply AI-generated area labels to existing untriaged issues.
   workflow_dispatch: