fix(test): remove python connector (#12153)

* [TD-14358]<fix>: remove python connector from TDengine

* [TD-14358]<fix>: use standalone python connector

* add python clone in TDinternal

* git clean before checkout

* git clean before checkout

* fix: remove python connector

fix test requirements.txt

[TD-14358]

tests/requirements.txt

-../src/connector/python
+taospy
 numpy
 fabric2
 psutil
-pandas
\ No newline at end of file
+pandas