Laravel 9.x Shift (#14504)

* Move `resources/lang` folder

* Shift registered middleware

* Remove `fruitcake/laravel-cors` dependency

* Streamline `$commands` property

* Upgrade to Flysystem 3.0

* Shift core files

* Convert `optional()` to nullsafe operator

* Remove unnecessary `$model` property

* Convert route options to fluent methods

Laravel 8 adopts the tuple syntax for controller actions. Since the old options array is incompatible with this syntax, Shift converted them to use modern, fluent methods.

* Convert deprecated `$dates` property to `$casts`

* Shift config files

* Default config files

In an effort to make upgrading the constantly changing config files
easier, Shift defaulted them and merged your true customizations -
where ENV variables may not be used.

* Bump Laravel dependencies

* Use `<env>` tags for configuration

`<env>` tags have a lower precedence than system environment variables making it easier to overwrite PHPUnit configuration values in additional environments, such a CI.

Review this blog post for more details on configuration precedence when testing Laravel: https://jasonmccreary.me/articles/laravel-testing-configuration-precedence/

* Fix error provider

* Match new symfony syntax

* Match upstream syntax

* Fix route syntax

* generate composer.lock

* Sync back configs

* routes

* composer

* Fix more flare

* fix cors

* sync lang

* Apply fixes from StyleCI (#14517)

Co-authored-by: StyleCI Bot <bot@styleci.io>

* bump larastan

* update packages

* wip

* Temporarily lower phpstan level

* Update phpstan.neon

* wip

* wip

* wip

* Apply fixes from StyleCI (#14592)

Co-authored-by: StyleCI Bot <bot@styleci.io>

* test

* Update CiHelper.php

* Update test.yml

* Update CiHelper.php

* Update CiHelper.php

* Apply fixes from StyleCI (#14616)

Co-authored-by: StyleCI Bot <bot@styleci.io>

* test?

* fix phpstan problems

* dont run snmpsim on github ci

* Fix whitespace

* More whitespace

* More whitespace ???

* I think the space broke it

* fix the reset of the whitespace

* hard code auth guard

---------

Co-authored-by: Shift <shift@laravelshift.com>
Co-authored-by: StyleCI Bot <bot@styleci.io>
Co-authored-by: Tony Murray <murraytony@gmail.com>

config/session.php

@@ -80,7 +80,7 @@ return [
     |
     */
 
-    'connection' => env('SESSION_CONNECTION', null),
+    'connection' => env('SESSION_CONNECTION'),
 
     /*
     |--------------------------------------------------------------------------
@@ -108,7 +108,7 @@ return [
     |
     */
 
-    'store' => env('SESSION_STORE', null),
+    'store' => env('SESSION_STORE'),
 
     /*
     |--------------------------------------------------------------------------
@@ -163,7 +163,7 @@ return [
     |
     */
 
-    'domain' => env('SESSION_DOMAIN', null),
+    'domain' => env('SESSION_DOMAIN'),
 
     /*
     |--------------------------------------------------------------------------