tests: run on pyodide (#4745)

* tests: run on pyodide

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* ci: use cibuildwheel for pyodide test

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* tests: revert changes to test_embed

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

---------

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

.github/workflows/emscripten.yaml

@@ -0,0 +1,30 @@
+name: WASM
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+    - master
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build-wasm-emscripten:
+    name: Pyodide wheel
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: true
+        fetch-depth: 0
+
+    - uses: pypa/cibuildwheel@v2.19
+      env:
+        PYODIDE_BUILD_EXPORTS: whole_archive
+        CFLAGS: -fexceptions
+        LDFLAGS: -fexceptions
+      with:
+        package-dir: tests
+        only: cp312-pyodide_wasm32