chore: set func_only=True to avoid counting the fixture cost towards …

…the timeout

ibis/backends/tests/tpc/conftest.py

@@ -56,6 +56,11 @@ def inner(test: Callable[..., ir.Table]):
         # join performance black holes
         #
         # trino can sometimes take a while as well, especially in CI
+        #
+        # func_only=True doesn't include the fixture setup time in the duration
+        # of the test run, which is important since backends can take a hugely
+        # variable amount of time to load all the TPC-$WHATEVER tables.
+        @pytest.mark.timeout(60, func_only=True)
         @pytest.mark.usefixtures("backend")
         @pytest.mark.xdist_group(name)
         @getattr(pytest.mark, name)