Use SPDX license expression

[cdce8p]

What do these changes do?

Use the SPDX license identifier as recommended by PEP 639.
https://spdx.org/licenses/Apache-2.0.html

[codspeed-hq]

CodSpeed Performance Report

Merging #9944 will not alter performance

_{Comparing cdce8p:spdx (8b836c1) with master (9ca1a58)}

Summary

✅ 42 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.72%. Comparing base (9ca1a58) to head (8b836c1).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9944      +/-   ##
==========================================
+ Coverage   98.70%   98.72%   +0.01%     
==========================================
  Files         121      121              
  Lines       36621    36621              
  Branches     4376     4376              
==========================================
+ Hits        36146    36153       +7     
+ Misses        319      315       -4     
+ Partials      156      153       -3     

Flag	Coverage Δ
CI-GHA	98.61% <ø> (+0.01%)	⬆️
OS-Linux	98.30% <ø> (+0.01%)	⬆️
OS-Windows	96.12% <ø> (+0.08%)	⬆️
OS-macOS	97.39% <ø> (ø)
Py-3.10.11	97.24% <ø> (ø)
Py-3.10.15	97.79% <ø> (ø)
Py-3.11.10	97.83% <ø> (+<0.01%)	⬆️
Py-3.11.9	97.29% <ø> (+0.01%)	⬆️
Py-3.12.7	98.36% <ø> (ø)
Py-3.13.0	98.35% <ø> (-0.01%)	⬇️
Py-3.9.13	97.16% <ø> (+0.29%)	⬆️
Py-3.9.20	97.75% <ø> (+0.74%)	⬆️
Py-pypy7.3.16	97.31% <ø> (?)
VM-macos	97.39% <ø> (ø)
VM-ubuntu	98.30% <ø> (+0.01%)	⬆️
VM-windows	96.12% <ø> (+0.08%)	⬆️

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[patchback]

Backport to 3.11: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.11/69ca7df64c775487b374897522163e78390caaf7/pr-9944

Backported as #9945

🤖 @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/3.12/69ca7df64c775487b374897522163e78390caaf7/pr-9944

Backported as #9946

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

[patchback]

Backport to 3.10: 💚 backport PR created

✅ Backport PR branch: patchback/backports/3.10/69ca7df64c775487b374897522163e78390caaf7/pr-9944

Backported as #9947

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