fix(eap-spans): file_extension test should be deterministic (#93229)

Need to add `orderby`

Author: DominikB2014

tests/snuba/api/endpoints/test_organization_events_span_indexed.py

@@ -5502,6 +5502,7 @@ def test_file_extension(self):
                 "field": [
                     "file_extension",
                 ],
+                "orderby": "file_extension",
                 "project": self.project.id,
                 "dataset": self.dataset,
             }