CI: rework publishing

[hombit]

• Do not publish PyPy wheels
• Run wheel building each time
• Drop build actions in test.yml

Fix #345, fix #335

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.06%. Comparing base (6538a5e) to head (3a1d97b).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #347   +/-   ##
=======================================
  Coverage   85.06%   85.06%           
=======================================
  Files           9        9           
  Lines        2672     2672           
=======================================
  Hits         2273     2273           
  Misses        399      399           

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[codspeed-hq]

CodSpeed Performance Report

Merging #347 will not alter performance

_{Comparing rm-pypy-wheels (3a1d97b) with master (6538a5e)}

Summary

✅ 97 untouched benchmarks