Disable AzDO dependabot

[mmitche]

Disable AzDO dependabot.

[Copilot]

Pull Request Overview

This PR disables Dependabot on Azure DevOps by adding a configuration file that turns off both campaigned updates and security updates, as the repository is mirrored and dependency updates should be managed through GitHub instead.

• Adds .azuredevops/dependabot.yml configuration file to disable Dependabot on Azure DevOps
• Sets both enable-campaigned-updates and enable-security-updates to false
• Includes explanatory comment about the mirrored repository setup

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.02%. Comparing base (4a3e8ae) to head (e950463).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7553      +/-   ##
==========================================
- Coverage   69.02%   69.02%   -0.01%     
==========================================
  Files        1482     1482              
  Lines      274093   274093              
  Branches    28266    28266              
==========================================
- Hits       189194   189186       -8     
- Misses      77515    77521       +6     
- Partials     7384     7386       +2     

Flag	Coverage Δ
Debug	69.02% <ø> (-0.01%)	⬇️
production	63.31% <ø> (-0.01%)	⬇️
test	89.47% <ø> (ø)

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see 8 files with indirect coverage changes

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[ericstj]

Failure is known -- #7343
But BA is not going green due to - #7344

[ericstj]

/ba-g BA is busted in ml.net.