[Packaging][Python] Build and test against Pyodide 314.0 (`2026_0` ABI)
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Description
### Describe the enhancement requested
Hi! We've released Pyodide 314.0.0 recently ([blog post](https://blog.pyodide.org/posts/314-release/), [CHANGELOG](https://pyodide.org/en/stable/project/changelog.html)), which brings forth a new Pyodide `2026_0` ABI.
PyArrow in Pyodide 0.28 was disabled for users because it has not been built against this new ABI. It was later built in https://github.com/pyodide/pyodide-recipes/pull/580, but it would be great if the testing infrastructure can test it here.
cc: @hoodmane @ryanking13 @joemarshall
- [ ] Build and test against Pyodide 314.0.0 (I'll put up a PR for this; edit: gh-47330)
xref: https://github.com/pyodide/pyodide-recipes/issues/99, https://github.com/marimo-team/marimo/pull/5995#issuecomment-3175520742, gh-34996
### Component(s)
Packaging, Python
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