eventually we will make the cookie jar derive these values from the
request object rather than save a reference to the values

The cookie jar can just ask the request object for the information it
needs.  This allows us to stop allocating hashes for options, and also
allows us to delay calculating values in advance.  Generating the
options hash forced us to calculate values that we may never have needed
at runtime

Accessing a request object has nice advantages over accessing a hash.
If you use a missing method name, you'll get an exception rather than a
`nil` (is one nice feature)

This decouples the `call` method from knowing the SCRIPT_NAME key and
offloads decisions about how to access script_name

This way JobSerializationTest runs in isolation without errors.

Add dev caching toggle / server options

Taken from @Sonopa's commits on PR #19091.

Add support for dev caching via "rails s" flags.

Implement suggestions from @kaspth.

Remove temporary cache file if server does not have flags.

Break at 80 characters in railties/CHANGELOG.md

Remove ability to disable cache based on server options.

Add more comprehensive options: --dev-caching / --no-dev-caching

Should use `server_info[:version]` instead of `info[:version]`

Make ActiveJob locale aware

migration and association guides: added some remarks about join tables

When `#perform_later` is called the locale isn't stored on the
queue, which results in a locale reset when the job is performed.

An example of the problem:

    I18n.locale = 'de'
    HelloJob.perform_now # german message, correct

but

    I18n.locale = 'de'
    HelloJob.perform_later # english message, incorrect

This PR attaches the current I18n.locale to every job during the
serialization process. It is then restored during deserialization
and used to perform the job with the correct locale.

It falls back to the default locale if no serialized locale is
found in order to provide backward compatibility with previously
stored jobs. It is not necessary to clear the queue for the update.

Because `info[:version]` is a client version, the server version is
`server_info[:version]`.

Allow Minitest to load plugins. Fixes #21102

Inform user to add script in correct location into the application.js manifest file [ci skip]

use it

change the warning

Fix the documentation of Hash#except method [ci skip]

fix minor problems

This reverts commit 465f0fbc.

This breaks some cases where non file / directory arguments are passed
to the runner (for example db:migrate).

I still think that we can get this to work. From what I can tell there
is no reason why db:migrate is passed along to `Minitest.run`. I'll
revert and investigate possible solutions.

Fixes #21085.

Publish the "Caching with Rails" guide

Inform user to add styles in correct location in application.css

[ci skip]

Before this patch, using `bin/rails test` with a non existing
file or directory argument would silently swallow the argument and
run the whole test suite.

After the patch the command fails with `cannot load such file --`.

Add missing assertion for test_route_with_colon_first

Update Time#advance documentation with examples [ci skip]

Fix ambiguous argument warning