Add DCO merge group workflow configuration

[ashwinvaidya17]

📝 Description

• We need this workflow because due to current limitation by DCO it does not run on merge groups

✨ Changes

Select what type of change your PR is:

• 🐞 Bug fix (non-breaking change which fixes an issue)
• 🔨 Refactor (non-breaking change which refactors the code base)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🔒 Security update

✅ Checklist

Before you submit your pull request, please make sure you have completed the following steps:

• 📋 I have summarized my changes in the CHANGELOG and followed the guidelines for my type of change (skip for minor changes, documentation updates, and test enhancements).
• 📚 I have made the necessary updates to the documentation (if applicable).
• 🧪 I have written tests that support my changes and prove that my fix is effective or my feature works (if applicable).

For more information about code review checklists, see the Code Review Checklist.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.11%. Comparing base (084331d) to head (2cca9b0).
Report is 20 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2528      +/-   ##
==========================================
+ Coverage   78.94%   79.11%   +0.16%     
==========================================
  Files         311      311              
  Lines       13197    13201       +4     
==========================================
+ Hits        10419    10444      +25     
+ Misses       2778     2757      -21     

Flag	Coverage Δ
integration_py3.10	64.51% <ø> (?)
unit_py3.10	64.72% <ø> (?)

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[samet-akcay]

does this have to be a standalone workflow, or can we add this to one of our checks like pr.yaml?