chore: bump pytest-xdist from 2.5.0 to 3.2.0 in /tests

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 2.5.0 to 3.2.0.
- [Release notes](https://github.com/pytest-dev/pytest-xdist/releases)
- [Changelog](https://github.com/pytest-dev/pytest-xdist/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest-xdist/compare/v2.5.0...v3.2.0)

---
updated-dependencies:
- dependency-name: pytest-xdist
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

tests/requirements_py3.txt

@@ -19,7 +19,7 @@ pyparsing==3.0.9
 pytest==7.2.1
 pytest-html==3.2.0
 pytest-metadata==2.0.4
-pytest-xdist==2.5.0
+pytest-xdist==3.2.0
 python-lzo==1.14
 PyYAML==6.0
 redo==2.0.4