Revert "removed duplicate one from pytest"

This reverts commit 24117a2.

Author: mepr1

pytest.ini

@@ -55,5 +55,6 @@ markers =
     spine_retrieval_search_tests: tests that are part of subject spine retrieval demographics
     hub_user_tests: tests that are part of the hub user test suite
     fobt_regression_tests: tests that are part of the fobt regression test suite
+    survelliance_regression_tests: tests that are part of the survelliance regression test suite
     lynch_self_referral_tests: tests that are part of the lynch self referral test suite
     surveillance_regression_tests: tests that are part of the surveillance regression test suite