[py] added type hinting support to ActionChains and Alert class

[sandeepsuryaprasad]

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Description

Added Type Hints to all methods in ActionChains and Alert class

Motivation and Context

Added Type Hints to all methods in ActionChains and Alert class

Types of changes

• [] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• [] Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• [] My change requires a change to the documentation.
• [] I have updated the documentation accordingly.
• [] I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Patch coverage: 79.54% and project coverage change: +0.92 🎉

Comparison is base (47f993f) 56.92% compared to head (d58f9b7) 57.84%.

❗ Current head d58f9b7 differs from pull request most recent head 5aa4b01. Consider uploading reports for the commit 5aa4b01 to get more accurate results

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Additional details and impacted files

@@            Coverage Diff             @@
##            trunk   #12290      +/-   ##
==========================================
+ Coverage   56.92%   57.84%   +0.92%     
==========================================
  Files          86       86              
  Lines        5423     5437      +14     
  Branches      193      193              
==========================================
+ Hits         3087     3145      +58     
+ Misses       2143     2099      -44     
  Partials      193      193              

Impacted Files	Coverage Δ
py/selenium/webdriver/common/action_chains.py	62.25% <78.94%> (+32.32%)	⬆️
py/selenium/webdriver/common/alert.py	53.84% <80.00%> (+30.76%)	⬆️
py/selenium/webdriver/ie/options.py	47.50% <100.00%> (ø)

... and 1 file with indirect coverage changes

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[AutomatedTester]

the missing types that @mykola-mokhnach pointed out still need doing before we can merge

[sandeepsuryaprasad]

the missing types that @mykola-mokhnach pointed out still need doing before we can merge

I have incorporated all the comments given by @mykola-mokhnach

[AutomatedTester]

The actions tests are now failing. You can run them with //py:test-chrome-test/selenium/webdriver/common/interactions_tests.py

[sandeepsuryaprasad]

The actions tests are now failing. You can run them with //py:test-chrome-test/selenium/webdriver/common/interactions_tests.py

I fixed it. I forgot to initialise the functions that was taking Optional WebElement to None. Now it's fixed. All tests are passing in my local.