Clean up railties tests

Merge pull request #16314 from zoltankiss/allow-nested-has-many-associations-on-unpersisted-parent-instances

fix nested `has many :through` associations on unpersisted parent instances

  Remove `AppGeneratorTest#test_active_storage_install`.
  The test is added by 67db41aa,
  since #31534 this test doesn't test anything.

  Remove redundant assertions in `SharedGeneratorTests`.
  These assertions is added by 4a835aa3.
  Follows 67db41aa, #31534.

I removed redundant `Array.wrap(records)` since `Preloader` is nodoc
class and Active Record always pass `records` as an array to
`Preloader`.
But if users relies on that behavior, it is not worth dropping its
behavior.

Fixes #31661.

Fix performance issue with NameError#missing_name on ruby >= v2.3.0.

Consistency between first() and last() with limit

Don't include Active Storage migrations in new apps

Change Active Storage destroy callbacks

There is concern that only blob are deleted depending on
the `before_destroy` definition order which throws abort.

To pick up 21417e02

Brought to you by a 12 year old Firefox bug: https://bugzilla.mozilla.org/show_bug.cgi?id=329509

Explicitly declare inverse associations so ActiveStorage::Attachment touches the original record instance.

Closes #31542.

Allow overriding filename in `Blob#service_url`

This is useful when we have several representations for the same
underlying file, each one with a different name, and we need to provide
a custom download URL based on that name and not that of the underlying
file.

Fix rubocop space before comma

`ActiveSupport::OrderedOptions` responds to any message.

Merge pull request #31547 from eugeneius/use_authenticated_message_encryption_new_framework_defaults

Allow use_authenticated_message_encryption to be set in new_framework_defaults_5_2.rb

Enabling this option in new_framework_defaults_5_2.rb didn't work
before, as railtie initializers run before application initializers.

Using `respond_to?` to decide whether to set the option wasn't working
either, as `ActiveSupport::OrderedOptions` responds to any message.

Improve the deprecation message for using subclass of Rails::Application to start the Rails server

Currently deleting through records doesn't respect `source_type`. It
should not be ignored in that case.

Related #23209.
Fixes #24116.

We can use `relation.last(index)[-index]` instead of loading all records
when using reversible order because `last` will call `reverse_order`.

Currently `last` with `offset` behaves incorrectly because `offset` can
not be reversed like `limit`. Therefore, `offset` should also be handled
like `limit`.

Commit 4ec5b0d6 was for fixing the regression #18787, but #28379 fixes
#18787 as well. So 4ec5b0d6 is no longer necessary.

Force :attachment as content disposition for some content types

In this way we avoid HTML, XML, SVG and other files that can be rendered
by the browser to be served inline by default. Depending on the origin
from where these files are served, this might lead to XSS
vulnerabilities, and in the best case, to more realistic phishing
attacks and open redirects.

We force it rather than falling back to it when other disposition is not
provided. Otherwise it would be possible for someone to force inline
just by passing `disposition=inline` in the URL.

The list of content types to be served as attachments is configurable.

Since #25037, `queue_adapter=` simply delegates to `interpret_adapter`
only.