dhkem-x448: use hmac/sha2 in hpke/common.

[dajiaji]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.57%. Comparing base (e45b57c) to head (ed9aaf8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #601      +/-   ##
==========================================
- Coverage   81.24%   80.57%   -0.68%     
==========================================
  Files          82       78       -4     
  Lines        8213     7423     -790     
  Branches      651      630      -21     
==========================================
- Hits         6673     5981     -692     
+ Misses       1529     1431      -98     
  Partials       11       11              

Flag	Coverage Δ
unittests	80.57% <100.00%> (-0.68%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.