add strict asyncio_mode in pytest.ini

Fix deprecated asyncio_mode legacy pytest warnings

---

Migrated from D7784 (view on Phabricator)

Build is green

Patch application report for D7784 (id=28117)

Rebasing onto 094c5da5...

Current branch diff-target is up to date.

Changes applied before test

commit b712763909c9c158409b5c23e12f73791217a85d
Author: Pratyush Desai <pratyush.desai@liberta.casa>
Date:   Mon May 9 12:13:52 2022 +0200

    add strict asyncio_mode in pytest.ini

See https://jenkins.softwareheritage.org/job/DOBJSRPL/job/tests-on-diff/37/ for more details.

Merge request was accepted

approved this merge request

Merge request was merged

closed