when create task switch in python api, switch branch not show correctly,
due to we add some unnecessary attribute to switch task, this patch we
add `_task_ignore_attr` in class `Task` to ignore those unnecessary
attribute from `_task_default_attr`

Migrate all exists method call in PythonGateway to corresponding service

* Change logging.warning to logger.warning
* Add testing for logging about task code already in process definition

close: #8258

* [python] Fix task relation wrong hashable function

Currently our :class:`TaskRelation` have wrong __hash__
function, would mistake a object as same object. It failed
our dependence and process definition. this patch fix it
by adding `_KEY_ATTR` to overwrite TaskRelation's __eq__
and correct __hash__ func

close: #7627

* Fix code format

* Change class Base `to_dict` to `get_define` for more clearer
* Remove class TaskParams and sub class make code easy to
  understand and avoid task implement cycle dependence
* Remove class ObjectJsonBase in Task to reduce complexity

fix: #7271

* [python] Add task type python http

* Fix unittest error

* Fix UT error

* Add isort config file to fix conflict with black
* Add some doc about isort

* [ci] Add coverage check in CI

* Coverage add dependent

* Install pydolphinscheduler before run coverage

* Up test coverage to 87% and down threshold to 85%

* Fix code style

* Add doc about coverage

* [python] Add code style lint for GA

* Change github action name

* Auto change by black

* Fix flake8

* Fix broken link for pyds README.md

* Auto fix by black

* Separate GitHub workflows

* Add Black badge and CI locally in README.md

* Add CI for python API

* Fix task assign without process definition

* Fix ci

* Add header

* Add build badge for pydolphinscheduler

* Add content to README.md

* Remove unnecessary blank line

* Init DS python SDK pydolphinscheduler: python code definition

* Doc first

* Add quick start and developer doc

* Java documentation change

* Add LICENSE-py4j.txt

* Add py4j to release-docs/LICENSE

* Move dependency version to parent pom

* Remove outdated code

* Add tenant parameter to tutorial