HPy: mark more tests as requiring syncgc

Author: timfel

graalpython/lib-graalpython/modules/hpy/test/test_hpyfield.py

@@ -308,6 +308,7 @@ def count_pairs():
         gc.collect()
         assert count_pairs() == 0
 
+    @pytest.mark.syncgc
     def test_tp_finalize(self):
         # Tests the contract of tp_finalize: what it should see
         # if called from within HPyField_Store

graalpython/lib-graalpython/modules/hpy/test/test_hpytype_legacy.py

@@ -95,6 +95,7 @@ def test_legacy_dealloc(self):
         import gc; gc.collect()
         assert mod.get_counter() == 1
 
+    @pytest.mark.syncgc
     def test_legacy_dealloc_and_HPy_tp_traverse(self):
         import pytest
         mod_src = """
@@ -129,6 +130,7 @@ def test_legacy_dealloc_and_HPy_tp_traverse(self):
             mod = self.make_module(mod_src)
         assert "legacy tp_dealloc" in str(err.value)
 
+    @pytest.mark.syncgc
     def test_legacy_dealloc_and_HPy_tp_destroy(self):
         import pytest
         mod_src = """