[py] Remove deprecated code in driver classes

[titusfortner]

Description

• get_remote_connection() is kind of a clever hack to be able to use browser specific methods in remote webdriver class. I would love if we can get a mixin or something to better support these. Regardless, what is there currently does not work for Chrome or Edge because the browser_name of the ChromiumRemoteConnection is None.
• Removed the keep_alive deprecation notice. It doesn't belong in Service class, so it is better off where it is still. Probably what we want is to have a "ClientConfig" class like Java where user can specify keep_alive, proxy, timeouts (and number of retries?). It would also let us better handle _ignore_local_proxy which is currently getting set in Options. Anyway, future PR.
• The driver class constructors have defaults so I removed some of the "if None" type protections that I don't think are needed. I'm pretty sure this logic covers everything.
• Removed w3c option warnings. The driver can error if it has a problem with anything w3c compliant that gets passed along.

Motivation and Context

It's really difficult to see what is going on in Python code with deprecations everywhere
All of this has been deprecated since 4.0 or earlier.

I'm honestly not sure when to set things to self and when not to, and when to reference things as self, so this code can probably be cleaned up even more.

[codecov-commenter]

Codecov Report

Patch coverage: 63.51% and project coverage change: -0.25 ⚠️

Comparison is base (c1e47d3) 55.93% compared to head (5d790b2) 55.69%.

❗ Current head 5d790b2 differs from pull request most recent head 5e7a7bf. Consider uploading reports for the commit 5e7a7bf to get more accurate results

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Additional details and impacted files

@@            Coverage Diff             @@
##            trunk   #12030      +/-   ##
==========================================
- Coverage   55.93%   55.69%   -0.25%     
==========================================
  Files          86       86              
  Lines        5746     5421     -325     
  Branches      233      223      -10     
==========================================
- Hits         3214     3019     -195     
+ Misses       2299     2179     -120     
+ Partials      233      223      -10     

Impacted Files	Coverage Δ
py/selenium/webdriver/chromium/options.py	75.30% <ø> (+1.15%)	⬆️
py/selenium/webdriver/remote/webdriver.py	40.22% <0.00%> (-1.90%)	⬇️
py/selenium/webdriver/remote/webelement.py	35.46% <ø> (-0.13%)	⬇️
py/selenium/webdriver/safari/webdriver.py	47.36% <50.00%> (-9.78%)	⬇️
py/selenium/webdriver/safari/service.py	74.35% <57.14%> (-3.77%)	⬇️
py/selenium/webdriver/firefox/webdriver.py	63.63% <72.72%> (+10.22%)	⬆️
py/selenium/webdriver/ie/webdriver.py	84.61% <72.72%> (+6.69%)	⬆️
py/selenium/webdriver/edge/webdriver.py	80.00% <77.77%> (+2.50%)	⬆️
py/selenium/webdriver/chrome/webdriver.py	95.00% <100.00%> (+22.08%)	⬆️
py/selenium/webdriver/chromium/webdriver.py	45.09% <100.00%> (-9.85%)	⬇️
... and 1 more

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[AutomatedTester]

Initial review and looks ok

[titusfortner]

I tried a few things to get the lint test passing on CI, and nothing is working. Not sure how to proceed since things are passing just fine for me locally.