1. remove poetry dependency
2. add requirements.tx, test-requirements.txt, setup.py and setup.cfg
3. add more env into tox.ini
4. remove some command from Makefile
5. cleanup the dependencies
6. change some commands of README
7. update the devstack
Depends-On: https://review.opendev.org/c/openstack/skyline-console/+/843257
Change-Id: I4cefc4cfdaadf7b3ba03ffe8441e9ae760772349
