fix(http): runtime types for getCookies

[lionel-rowe]

Fixes #6852

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.08%. Comparing base (5e55eff) to head (4a3a236).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6853      +/-   ##
==========================================
- Coverage   94.08%   94.08%   -0.01%     
==========================================
  Files         578      578              
  Lines       42655    42654       -1     
  Branches     6782     6781       -1     
==========================================
- Hits        40134    40133       -1     
  Misses       2470     2470              
  Partials       51       51              

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[kt3k]

Runtime change looks good to me. I'm not in favor of the type change. The change looks too breaking to the ecosystem to me. Also if a user prefers to get 'correct' type when accessing cookies['key'], they can enable noUncheckedIndexedAccess flag in their "compilerOption" (The same argument applies to the all Record-returning APIs in general)

[kt3k]

LGTM!