[PR #10393/9057364b backport][3.12] Revert "Start building riscv64 platform wheels in CI/CD"

[patchback]

This is a backport of PR #10393 as merged into master (9057364).

cibuildwheel does not support riscv64 yet so this PR made the release fail

ValueError: 'riscv64' is not a valid Architecture

https://github.com/aio-libs/aiohttp/actions/runs/13164143542/job/36740982377

Reverts #10330

[codspeed-hq]

CodSpeed Performance Report

Merging #10395 will not alter performance

_{Comparing patchback/backports/3.12/9057364b78259fdd77bb10480813b00adc49ee43/pr-10393 (0ddc1ba) with 3.12 (7f7afba)}

Summary

✅ 47 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.07%. Comparing base (7f7afba) to head (0ddc1ba).
Report is 229 commits behind head on 3.12.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             3.12   #10395   +/-   ##
=======================================
  Coverage   98.07%   98.07%           
=======================================
  Files         123      123           
  Lines       37325    37325           
  Branches     2114     2114           
=======================================
  Hits        36607    36607           
  Misses        548      548           
  Partials      170      170           

Flag	Coverage Δ
CI-GHA	97.96% <ø> (ø)
OS-Linux	97.66% <ø> (ø)
OS-Windows	94.72% <ø> (ø)
OS-macOS	96.79% <ø> (-0.01%)	⬇️
Py-3.10.11	94.31% <ø> (-2.38%)	⬇️
Py-3.10.16	?
Py-3.11.11	97.36% <ø> (ø)
Py-3.11.9	94.40% <ø> (-2.39%)	⬇️
Py-3.12.8	97.76% <ø> (ø)
Py-3.13.1	97.75% <ø> (ø)
Py-3.9.13	96.60% <ø> (+<0.01%)	⬆️
Py-3.9.21	97.15% <ø> (ø)
Py-pypy7.3.16	96.73% <ø> (-0.01%)	⬇️
VM-macos	96.79% <ø> (-0.01%)	⬇️
VM-ubuntu	97.66% <ø> (ø)
VM-windows	94.72% <ø> (ø)

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