Remove internal options from query string of paths

Fixes #17057
Improve welcome page css and table cell aignments.
Use released rails-html-sanitizer and rails-deprecated_sanitizer
Revert "Revert "Merge pull request #16888 from jejacks0n/render_template""

This reverts commit 585e75696b31395aee895e5366e331c07c3f5ee1.
Fix actionpack test cases broken by #16888
Fix string/gid collision in job arguments

Serialize Global IDs as special objects, distinguishable from Strings
Merge pull request #17024 from buddhamagnet/amend-welcome-page

Amend welcome page
:nail_care: the CSS
Remove unused code
rails-html-sanitizer is now the default

Also add to upgrading guide a notice about the deprecated sanitizers
No need to install the deprecated_sanitizer gem

It is not being used in our tests
Merge pull request #17058 from eval/issue-17057

Remove internal options from query string of paths
Keep the original implementation to not having to allocate new objects
No need CHANGLOG entry for a bug in a non released version

[ci skip]
Ensure named path params are symbols (Fixes #16958)
Merge pull request #16966 from why-el/symbolize-path-params

Ensure named path params are symbols (Fixes #16958)
[ci skip] Remove reference to config.threadsafe! in guides/configuriing.md
remove extra # in css
Merge pull request #17059 from bronzle/remove_threadsafe_from_guides

[ci skip] Remove reference to config.threadsafe! in guides/configuring.md
Merge pull request #17061 from bronzle/remove_extra_#

remove extra # in css