FIX Change rust packages not to build concurrently. ### Description

Resolve #3565

### Checklists

- [x] Add a [CHANGELOG](https://github.com/pyodide/pyodide/blob/main/docs/project/changelog.md) entry
- [x] Add / update tests

from pytest_pyodide import run_in_pyodide


@run_in_pyodide(packages=["Jinja2"])
def test_jinja2(selenium):
    import jinja2

    template = jinja2.Template("Hello {{ name }}!")
    content = template.render(name="Zach")
    assert content == "Hello Zach!"

from pytest_pyodide import run_in_pyodide


@run_in_pyodide(packages=["Jinja2"])
def test_jinja2(selenium):
    import jinja2

    template = jinja2.Template("Hello {{ name }}!")
    content = template.render(name="Zach")
    assert content == "Hello Zach!"
