Restore total_bytes to EmptyStreamReader

[bdraco]

What do these changes do?

fixes #10386

Are there changes in behavior for the user?

bugfix

Is it a substantial burden for the maintainers to support this?

no

[codspeed-hq]

CodSpeed Performance Report

Merging #10387 will not alter performance

_{Comparing stream_total_bytes_fix (b0fa320) with master (8bf5d4d)}

Summary

✅ 47 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.75%. Comparing base (8bf5d4d) to head (b0fa320).
Report is 1 commits behind head on master.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #10387      +/-   ##
==========================================
- Coverage   98.76%   98.75%   -0.01%     
==========================================
  Files         122      122              
  Lines       37048    37050       +2     
  Branches     2042     2042              
==========================================
- Hits        36590    36589       -1     
- Misses        318      321       +3     
  Partials      140      140              

Flag	Coverage Δ
CI-GHA	98.64% <100.00%> (-0.01%)	⬇️
OS-Linux	98.32% <100.00%> (-0.01%)	⬇️
OS-Windows	96.23% <100.00%> (+<0.01%)	⬆️
OS-macOS	97.44% <100.00%> (-0.01%)	⬇️
Py-3.10.11	97.33% <100.00%> (-0.01%)	⬇️
Py-3.10.16	97.90% <100.00%> (+<0.01%)	⬆️
Py-3.11.11	97.99% <100.00%> (-0.01%)	⬇️
Py-3.11.9	97.41% <100.00%> (+<0.01%)	⬆️
Py-3.12.8	98.42% <100.00%> (+<0.01%)	⬆️
Py-3.13.1	98.41% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	97.22% <100.00%> (-0.01%)	⬇️
Py-3.9.21	97.78% <100.00%> (+<0.01%)	⬆️
Py-pypy7.3.16	97.37% <100.00%> (+<0.01%)	⬆️
VM-macos	97.44% <100.00%> (-0.01%)	⬇️
VM-ubuntu	98.32% <100.00%> (-0.01%)	⬇️
VM-windows	96.23% <100.00%> (+<0.01%)	⬆️

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[patchback]

Backport to 3.11: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.11/95b28c71fce258f3383ab6ef7f9b6a2a0a65ce46/pr-10387

Backported as #10388

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.

[patchback]

Backport to 3.12: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.12/95b28c71fce258f3383ab6ef7f9b6a2a0a65ce46/pr-10387

Backported as #10389

🤖 @patchback
I'm built with octomachinery and
my source is open — https://github.com/sanitizers/patchback-github-app.