Skip some cases not supported yet (#21522)

Signed-off-by: nico <cheng.yuan@zilliz.com>

tests/python_client/testcases/test_alias.py

@@ -448,6 +448,7 @@ class TestAliasOperationInvalid(TestcaseBase):
         #                          check_items=error)
 
     @pytest.mark.tags(CaseLabel.L1)
+    @pytest.mark.skip("not supported on mysql")
     def test_alias_drop_not_exist_alias(self):
         """
         target: test collection dropping alias which is not exist

tests/python_client/testcases/test_search.py

@@ -3803,6 +3803,7 @@ class TestsearchPagination(TestcaseBase):
 
     @pytest.mark.tags(CaseLabel.L1)
     @pytest.mark.parametrize("limit", [10, 20])
+    @pytest.mark.skip("issue #21444")
     def test_search_with_pagination(self, offset, auto_id, limit, _async):
         """
         target: test search with pagination
@@ -3837,6 +3838,7 @@ class TestsearchPagination(TestcaseBase):
         assert set(search_res[0].ids) == set(res[0].ids[offset:])
 
     @pytest.mark.tags(CaseLabel.L1)
+    @pytest.mark.skip("issue #21444")
     def test_search_string_with_pagination(self, offset, auto_id, _async):
         """
         target: test search string with pagination
@@ -4000,6 +4002,7 @@ class TestsearchPagination(TestcaseBase):
         assert set(search_res[0].ids) == set(res[0].ids[offset:])
 
     @pytest.mark.tags(CaseLabel.L2)
+    @pytest.mark.skip("issue #21444")
     def test_search_pagination_with_index_partition(self, offset, auto_id, _async):
         """
         target: test search pagination with index and partition
@@ -4163,6 +4166,7 @@ class TestsearchPagination(TestcaseBase):
     @pytest.mark.parametrize("index, params",
                              zip(ct.all_index_types[:7],
                                  ct.default_index_params[:7]))
+    @pytest.mark.skip("issue #21444")
     def test_search_pagination_after_different_index(self, index, params, auto_id, offset, _async):
         """
         target: test search pagination after different index