Add short-hand methods for text and blob types in MySQL

Per-form CSRF tokens

Provide a better error message if a user mistypes the name of script …

Add tests for detecting bad options for runner

While the type definition is in Active Model the change of behavior will
be only user facing in Active Record so better to put the entry in its
changelog.

[ci skip]

Take UTC offset into account when assigning string value to time attributes.

Fix `connection#create` in PG adapter

This fixes the case when you try to render an html you know safe and the
file is named something.html. With this commit the content of the html
won't be escaped anymore because AV won't use Raw handler and choose
Html handler instead.

[ci skip] Update doc/resource link removed by #21211

[ci skip] Add job suffix to sample's job file name

In Pg and Sqlite3, `:text` and `:binary` have variable unlimited length.
But in MySQL, these have limited length for each types (ref #21591, #21619).
This change adds short-hand methods for each text and blob types.

Example:

    create_table :foos do |t|
      t.tinyblob   :tiny_blob
      t.mediumblob :medium_blob
      t.longblob   :long_blob
      t.tinytext   :tiny_text
      t.mediumtext :medium_text
      t.longtext   :long_text
    end

Originally `connection#create` had aliased to `connection#insert` in PG
adapter. But it was broken by #7447. Re-alias `create` to `insert` for
fixing it.

Fix `unsigned?` and `blob_or_text_column` for Enum columns in MySQL

Add ActionController:Renderers test

activerecord: allocate fewer objects

Fix user name in doc [ci skip]

Allow add_to_transaction with null transaction

titleize the model name on default submit buttons

To complement actionpack/test/controller/metal/renderers_test.rb

Replace x.times.map{} with Array.new(x){} in AD::Journey::Path::Pattern

Fix typo in test description

Updated Gemfile.lock with latest change related to sucker_punch dependency

- Followup of https://github.com/rails/rails/commit/bc194937ad6c1fa12bca73cfc05de39a97ba783d.

move CHANGELOG entry to the appropriate position [ci skip]

petabyte and exabyte numeric conversion has been added after the 5.0.0.beta1 release.
ref: 85048e90

Remove FIXME comments about the `Arel::Nodes::Quoted` [ci skip]

Remove duplicate entry for ActiveRecord::Relation#cache_key from Rails 5 release notes [ci skip]

Ensure sucker_punch < v2 is installed due to the change in public API