1327 add concurrency for CI

[xsaschako]

Changes and Information

Please briefly list the changes (main added features, changed items, or corrected bugs) made:

• added concurrency cancellation

If need be, add additional information and what the reviewer should look out for in particular:

Merge Request - Guideline Checklist

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Checks by code author

• Every addressed issue is linked (use the "Closes #ISSUE" keyword below)
• New code adheres to coding guidelines
• No large data files have been added (files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• Tests are added for new functionality and a local test run was successful (with and without OpenMP)
• Appropriate documentation for new functionality has been added (Doxygen in the code and explanations in the online documentation)
• Proper attention to licenses, especially no new third-party software with conflicting license has been added
• (For ABM development) Checked benchmark results and ran and posted a local test above from before and after development to ensure performance is monitored.

Checks by code reviewer(s)

• Corresponding issue(s) is/are linked and addressed
• Code is clean of development artifacts (no deactivated or commented code lines, no debugging printouts, etc.)
• Appropriate unit tests have been added, CI passes, code coverage and performance is acceptable (did not decrease)
• No large data files added in the whole history of commits(files should in sum not exceed 100 KB, avoid PDFs, Word docs, etc.)
• On merge, add 2-5 lines with the changes (main added features, changed items, or corrected bugs) to the merge-commit-message. This can be taken from the briefly-list-the-changes above (best case) or the separate commit messages (worst case).

[Copilot]

Pull Request Overview

This PR adds concurrency control to the GitHub Actions CI workflow to automatically cancel in-progress workflow runs when new commits are pushed to the same branch or pull request. This optimization prevents redundant CI runs and reduces resource usage.

• Added concurrency group configuration to cancel duplicate workflow runs
• Configured automatic cancellation of in-progress runs for the same branch/PR

[mknaranja]

Great added value to not waste resources :)
Thanks @xsaschako

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.40%. Comparing base (9d72115) to head (fb5c75e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1328   +/-   ##
=======================================
  Coverage   97.40%   97.40%           
=======================================
  Files         174      174           
  Lines       15154    15154           
=======================================
  Hits        14760    14760           
  Misses        394      394           

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