Update ActiveJob adapter for sucker_punch 2.0

Fix img alt attribute generation when using Sprockets >= 3.0

Fix typo in strong params hash deprecation message

and remove unecessary spaces in string interpolation.

The commit which originally added this behavior did not consider that
doing `Subclass.new` does not actually populate the `type` field in the
attributes (though perhaps it should). We simply need to not use the
defaults for STI related things unless we are instantiating the base
class.

Fixes #23285.

This PR includes two changes for 2.0.0:

- Breaking API change around `async.perform` --> `perform_async`
- New addition of `perform_in`, which now allows end users of the
  adapter to use the `enqueued_at` public API method.

Fix small typos in asset_pipeline.md

Improvement in ActiveRecord::Persistence doc [ci skip]

Fix doc

Revert "Eliminate the EventMachine dependency"

remove duplication section [ci skip]

[ci skip]

We found that inserting all 600 schema_migrations for our mid-sized app takes about a minute on a cloud based CI environment.

I assume that the original code did not use multi-row-insert because SQLite3 was not supporting the syntax back then,
but it's been supported since 3.7.11: http://www.sqlite.org/releaselog/3_7_11.html

Fix undefined error for `ActionController::Parameters`

These tests were failing due to backwards incompatible changes, as apart
of the v1.0.3 release of rails-html-sanitizer.

The cache for `render file:` seems to also be used in the case of
`render(string)`.  If one is supposed to be a hit and the other is
supposed to be a miss, and they both reference the same file, then the
cache could return incorrect values.  This commit clears the cache
between runs so that we get non-cached behavior.

documentation fix

[ci skip] Don’t explicitly mention EventMachine

Since #23152 eliminated the EventMachine dependency, we don’t need to
explicitly mention EventMachine.

Nevertheless, I'm not 100% sure about saying "the websocket-driver loop"
driver… any suggestions, @matthewd or @pixeltrix ? 😅

[ci skip]

Update `Gemfile.lock`

* 5-0-beta-sec:
  bumping version
  fix version update task to deal with .beta1.1
  Eliminate instance level writers for class accessors
  allow :file to be outside rails root, but anything else must be inside the rails view directory
  Don't short-circuit reject_if proc
  stop caching mime types globally
  use secure string comparisons for basic auth username / password

Fix nodoc to internal class error document some of them

[ci skip]
Fixes #20808

[Vipul A M & Julio Lopez]

[close #23009] Limit key length

Pass 2 over testing guide

When verifying size of relation, also verify count is ok.