Update to Pyodide 314.0.0 (#2906)

* Update to Pyodide 314.0.0

* Update selector

* Update tests

* Use v2 xbuildenvs endpoint

* Update pyodide-build in constraints

* Add comment about `test_build_filter_pyodide_prerelease`

test/utils.py

@@ -31,7 +31,7 @@ EMULATED_ARCHS: Final[list[str]] = sorted(
 PYPY_ARCHS = ["x86_64", "i686", "AMD64", "aarch64", "arm64"]
 GRAALPY_ARCHS = ["x86_64", "AMD64", "aarch64", "arm64"]
 
-SINGLE_PYTHON_VERSION: Final[tuple[int, int]] = (3, 13)
+SINGLE_PYTHON_VERSION: Final[tuple[int, int]] = (3, 14)
 
 # temporary workaround: set by build_frontend_env fixture to skip graalpy
 # when uv is the build frontend (compatibility issue between graalpy and uv)
@@ -278,9 +278,9 @@ def _expected_wheels(
 
     # To be kept in sync with Python versions for Pyodide identifiers in cibuildwheel/selector.py.
     if platform == "pyodide" and python_abi_tags is None:
-        python_abi_tags = ["cp313-cp313"]
-        if EnableGroup.PyodidePrerelease in enable_groups:
-            python_abi_tags.append("cp314-cp314")
+        python_abi_tags = ["cp313-cp313", "cp314-cp314"]
+        if EnableGroup.PyodideEoL in enable_groups:
+            python_abi_tags.insert(0, "cp312-cp312")
     elif (platform == "android" and python_abi_tags is None) or (
         platform == "ios" and python_abi_tags is None
     ):
@@ -414,8 +414,8 @@ def _expected_wheels(
 
             if not platform_tags:
                 # for example if the python tag is `none` or `abi3`, the wheel
-                # is built by the stable cp313 Python version
-                platform_tags = ["pyemscripten_2025_0_wasm32"]
+                # is built by the latest stable cp314 Python version
+                platform_tags = ["pyemscripten_2026_0_wasm32"]
 
         else:
             msg = f"Unsupported platform {platform!r}"