Fix: add missing workflow_call trigger on Test Notify on Failure workflow

[dlachaume]

Content

This PR includes a fix for the test-notify-on-failure workflow to allow it to be triggered by the Nightly Dispatcher workflow.

Pre-submit checklist

• Branch
  • Tests are provided (if possible)
  • Crates versions are updated (if relevant)
  • CHANGELOG file is updated (if relevant)
  • Commit sequence broadly makes sense
  • Key commits have useful messages
• PR
  • No clippy warnings in the CI
  • Self-reviewed the diff
  • Useful pull request description
  • Reviewer requested
• Documentation
  • Update README file (if relevant)
  • Update documentation website (if relevant)
  • Add dev blog post (if relevant)

[github-actions]

Test Results

    4 files  ±0     52 suites  ±0   10m 25s ⏱️ +2s
1 569 tests ±0  1 569 ✅ ±0  0 💤 ±0  0 ❌ ±0 
1 843 runs  ±0  1 843 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 5ea3289. ± Comparison against base commit 31aa286.

[sfauvel]

LGTM

[jpraynaud]

LGTM