[Infra] Update BannedSymbols.txt

[martincostello]

Changes

Add more APIs to the banned list for production code.

Merge requirement checklist

• CONTRIBUTING guidelines followed (license requirements, nullable enabled, static analysis, etc.)
• Unit tests added/updated
• Appropriate CHANGELOG.md files updated for non-trivial changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.74%. Comparing base (8934056) to head (f7962a3).
⚠️ Report is 5 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7094      +/-   ##
==========================================
+ Coverage   88.73%   88.74%   +0.01%     
==========================================
  Files         270      270              
  Lines       12920    12928       +8     
==========================================
+ Hits        11464    11473       +9     
+ Misses       1456     1455       -1     

Flag	Coverage Δ
unittests-Project-Experimental	88.70% <ø> (+0.02%)	⬆️
unittests-Project-Stable	88.71% <ø> (-0.02%)	⬇️
unittests-Solution	88.68% <ø> (+0.03%)	⬆️
unittests-UnstableCoreLibraries-Experimental	41.30% <ø> (+0.07%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.
see 3 files with indirect coverage changes

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Updates the repository’s banned API list to restrict additional HttpClient/HttpContent convenience methods in production code.

Changes:

• Add HttpClient.GetByteArrayAsync(...) overloads to BannedSymbols.txt
• Add HttpClient.GetStringAsync(...) overloads to BannedSymbols.txt
• Add HttpContent.ReadAsByteArrayAsync(...) overloads to BannedSymbols.txt

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