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In the time #27149 undergoes review(s), this PR updates the Pyodide version for the Emscripten/WASM CI tests to [0.27.0](https://github.com/pyodide/pyodide/releases/tag/0.27.0), which we released on 01/01/2025.

#### Brief description of what is fixed or changed

Updated the `PYODIDE_VERSION:` environment variable in `.github/workflows/emscripten.yaml`

#### Other comments

N/A

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