add OpenSSF Scorecard

[mmorel-35]

Thank you for contributing to Velero!

Please add a summary of your change

add OpenSSF Scorecard

Does your change fix a particular issue?

Fixes #(issue)

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file or added /kind changelog-not-required as a comment on this pull request.
• Updated the corresponding documentation in site/content/docs/main.

[mmorel-35]

/kind changelog-not-required

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.02%. Comparing base (a6c5433) to head (e2ea7e3).
Report is 98 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8126   +/-   ##
=======================================
  Coverage   59.02%   59.02%           
=======================================
  Files         364      364           
  Lines       30272    30272           
=======================================
  Hits        17867    17867           
  Misses      10959    10959           
  Partials     1446     1446           

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[mateusoliveira43]

Can you explain what these badges do for the project?

are these 2, right?

[mmorel-35]

They provides a scoring of the conformity with the best practices of OpenSSF. They also give a dashboard to review them. This is also important to communicate how security is addressed in a standard way