[skip e2e]Create tests for import api (#16053)

Signed-off-by: Nyanliang567 <yanliang.qiao@zilliz.com>

tests/python_client/testcases/test_import.py

+import time
+import pytest
+
+from base.client_base import TestcaseBase
+from common import common_func as cf
+from common import common_type as ct
+from common.common_type import CaseLabel
+from utils.util_log import test_log as log
+
+
+class TestRowBasedImport(TestcaseBase):
+
+    @pytest.mark.tags(CaseLabel.L3)
+    def test_default(self):
+        pass
+
+
+class TestColumnBasedImport(TestcaseBase):
+    @pytest.mark.tags(CaseLabel.L3)
+    def test_default(self):
+        pass
+
+
+class TestImportInvalidParams(TestcaseBase):
+    @pytest.mark.tags(CaseLabel.L3)
+    def test_default(self):
+        pass
+
+
+class TestImportAdvanced(TestcaseBase):
+    """Validate data consistency and availability during import"""
+    @pytest.mark.tags(CaseLabel.L3)
+    def test_default(self):
+        pass
+