setup.py: dedup the requires

setup.py: dedup the requires

* move the dependencies from options.install_requires to
  options.extras_require if those dependencies are only used by tests.
  as per
  https://packaging.python.org/en/latest/discussions/install-requires-vs-requirements/#id5
  > install_requires is a setuptools setup.py keyword that should be
  > used to specify what a project minimally needs to run correctly.
* remove the duplicated dependencies from options.extras_require
  if they are also listed in options.install_requires.
* update requirements.txt using
  "pip-compile --extra=test pyproject.toml", so requirements.txt
  can include the dependencies required by tests.

Signed-off-by: Kefu Chai <tchaikov@gmail.com>