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Hello everyone. I was following the <https://docs.prefect.io/contributing/overview/|Contributing Guide>, but when I run `pytest tests` I get:
```ImportError while loading conftest '/Users/daniel.mesejo/PycharmProjects/prefect/tests/conftest.py'.
tests/conftest.py:67: in &lt;module&gt;
    from prefect.testing.cli import *
src/prefect/testing/cli.py:7: in &lt;module&gt;
    from prefect.cli import app
src/prefect/cli/__init__.py:9: in &lt;module&gt;
    import prefect.cli.cloud
src/prefect/cli/cloud.py:58: in &lt;module&gt;
    login_api = FastAPI(on_startup=[set_login_api_ready_event])
../../opt/anaconda3/envs/prefect/lib/python3.8/site-packages/fastapi/applications.py:124: in __init__
    self.router: routing.APIRouter = routing.APIRouter(
../../opt/anaconda3/envs/prefect/lib/python3.8/site-packages/fastapi/routing.py:502: in __init__
    super().__init__(
../../opt/anaconda3/envs/prefect/lib/python3.8/site-packages/starlette/routing.py:592: in __init__
    warnings.warn(
E   DeprecationWarning: The on_startup and on_shutdown parameters are deprecated, and they will be removed on version 1.0. Use the lifespan parameter instead. See more about it on <https://www.starlette.io/lifespan/>.```
This is because the latest version (0.94.0) of *FastAPI* uses the version 0.26.0.post1 of starlette, that it turn introduces the `DeprecationWarning`. The last update for FastAPI was done yesterday March 10th (see <https://pypi.org/project/fastapi/#history|here>).

In the short term downgrading to 0.93.0 (`pip install fastapi==0.93.0`) solves the issue, but perhaps for the future is worth creating a ticket to start using the <https://www.starlette.io/lifespan/|lifespan> parameter.  What would be the best course of action here? In any case I’ll be happy to help :slightly_smiling_face:.

We’ll want to first add an ignore for those warnings to our pytest configuration so we can run the test suite succesfully

Then we’ll want a second pull request to use the new parameter :slightly_smiling_face:

Here’s the first part since our CI on `main` is failing

<https://github.com/PrefectHQ/prefect/pull/8785>

Here’s a tracking issue for the fix <https://github.com/PrefectHQ/prefect/issues/8786>

Thanks! I’ll see if I can start working on it