⚠️ Add support for commit-based Scorecard

[azeemshaikh38]

• Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• PR title follows the guidelines defined in https://github.com/ossf/scorecard/blob/main/CONTRIBUTING.md#pr-process

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Adds support for commit-based Scorecard analysis. Part of Commit based scorecard #575. Will wait a bit after submitting this PR before closing the issue.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)
  Yes, the InitRepo API is changed.

[github-actions]

Integration tests success for
[0c401e1]
(https://github.com/ossf/scorecard/actions/runs/1809762137)

[github-actions]

Integration tests success for
[1f12364]
(https://github.com/ossf/scorecard/actions/runs/1809782448)

[codecov-commenter]

Codecov Report

Merging #1613 (1f12364) into main (1c95237) will increase coverage by 0.10%.
The diff coverage is 68.18%.

@@            Coverage Diff             @@
##             main    #1613      +/-   ##
==========================================
+ Coverage   55.05%   55.16%   +0.10%     
==========================================
  Files          72       72              
  Lines        6295     6308      +13     
==========================================
+ Hits         3466     3480      +14     
+ Misses       2604     2603       -1     
  Partials      225      225              

[laurentsimon]

Nice, thank you!