feat: add pyodide_315 support (#2958)

* Add pyodide_315 support

Guarded by cpython_prerelease for the moment.

* Update

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update constraints to pyodide-build 0.39.0

* Update to 315.0.0a2

* Remove example versions

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.github/workflows/test.yml

@@ -328,13 +328,13 @@ jobs:
         output-dir: wheelhouse
       env:
         CIBW_PLATFORM: pyodide
-        CIBW_ENABLE: pyodide-prerelease
+        CIBW_ENABLE: cpython-prerelease
 
     - name: Run tests with 'CIBW_PLATFORM' set to 'pyodide'
       run: uv run --no-sync ./bin/run_tests.py
       env:
         CIBW_PLATFORM: pyodide
-        CIBW_ENABLE: pyodide-prerelease
+        CIBW_ENABLE: cpython-prerelease
 
   test-uv-extras:
     name: Test uv extra on ${{ matrix.os }} ${{ matrix.test_select }}