Refactor selenium helper and use webdriver-manager to setup the webdriver

[jedie]

• Use: https://github.com/SergeyPirogov/webdriver_manager
• Removed old selenium helper function, see: https://github.com/jedie/django-tools/tree/v0.43.0#v043
• Make all Selenium web driver instances persistent for the complete test run session.

[codecov[bot]]

Codecov Report

Merging #61 (1bea772) into main (8c21e85) will decrease coverage by 0.74%. The diff coverage is 72.86%.

@@            Coverage Diff             @@
##             main      #61      +/-   ##
==========================================
- Coverage   81.47%   80.73%   -0.75%     
==========================================
  Files         151      149       -2     
  Lines        6123     6161      +38     
==========================================
- Hits         4989     4974      -15     
- Misses       1134     1187      +53     

Impacted Files	Coverage Δ
django_tools/publish.py	72.72% <ø> (+6.06%)	:arrow_up:
django_tools/selenium/cli.py	24.39% <24.39%> (ø)
django_tools/selenium/geckodriver.py	85.10% <80.76%> (-1.69%)	:arrow_down:
django_tools/selenium/base.py	73.33% <80.88%> (+2.02%)	:arrow_up:
...tools_test_project/tests/test_unittest_selenium.py	95.58% <89.18%> (-2.91%)	:arrow_down:
django_tools/selenium/chromedriver.py	83.92% <96.15%> (-10.62%)	:arrow_down:
django_tools/__init__.py	100.00% <100.00%> (ø)

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