chore(ci): Allow forks to opt-in for codeql (#19993)

[jsoref]

Fixes #19993

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.82%. Comparing base (6b6d23b) to head (273dc95).
Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #19996      +/-   ##
==========================================
- Coverage   55.83%   55.82%   -0.02%     
==========================================
  Files         320      320              
  Lines       44397    44397              
==========================================
- Hits        24790    24783       -7     
- Misses      17038    17054      +16     
+ Partials     2569     2560       -9     

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[nitishfy]

Overall LGTM. Can you go ahead and fix the failing unit test check?

[jsoref]

I opened #20035 about the race. It's out of scope.

We're working on removing the FOSSA check.