refactor: Remove cucumber based test in python (#3253)

* test(bindings/python): Remove cucumber based test

1. Remove tests based on `behave` library.
2. Update related documentations.

* fix(bindings/python): Enable memory test in workflow.

.github/workflows/bindings_python.yml

@@ -54,8 +54,10 @@ jobs:
           python -m pip install -e .[test]
       - name: Run behave
         working-directory: "bindings/python"
+        env:
+          OPENDAL_MEMORY_TEST: on
         run: |
-          python -m behave tests
+          pytest -vk TestMemory
 
   linux:
     runs-on: ubuntu-latest

bindings/python/CONTRIBUTING.md

@@ -67,11 +67,11 @@ Note: `maturin develop` will be faster, but doesn't support all the features. In
 
 ## Test
 
-OpenDAL adopts `behave` for behavior tests:
+OpenDAL adopts `pytest` for behavior tests:
 
 ```shell
 maturin develop -E test
-behave tests
+OPENDAL_MEMORY_TEST=on pytest -vk TestMemory
 ```
 
 ## Docs

bindings/python/README.md

@@ -66,7 +66,7 @@ Run some tests:
 
 ```shell
 maturin develop -E test
-behave tests
+OPENDAL_MEMORY_TEST=on pytest -vk TestMemory
 ```
 
 Build API docs:

bindings/python/pyproject.toml

@@ -41,7 +41,7 @@ benchmark = [
   "boto3-stubs[essential]",
 ]
 docs = ["pdoc"]
-test = ["behave", "pytest", "python-dotenv"]
+test = ["pytest", "python-dotenv"]
 
 [project.urls]
 Documentation = "https://opendal.apache.org/docs/python/opendal.html"