test: temporary lock pytest on 9.0.0 or earlier

There is a bug in pytest that makes one partuclar xfail test to fail on
cicd:
```
FAILED tests/integration/standard/test_application_info.py::ApplicationInfoTest::test_create_session_and_check_system_views_clients - [XPASS(strict)] #scylladb/scylla-enterprise#5467 - not released yet
```
Unlock it when it get fixed

Author: dkropachev

pyproject.toml

@@ -36,7 +36,7 @@ compress-snappy = ['python-snappy']
 
 [dependency-groups]
 dev = [
-    "pytest",
+    "pytest~=8.0",
     "PyYAML",
     "pytz",
     "scales",