phan: Add stubs for PHPUnit 9.6 (#36881)

PHPUnit 9.6 has three major issues when it comes to analysis with Phan:

* It uses `@psalm`-prefixed phpdocs various places, which Phan doesn't
  understand. This most obviously shows up with mock objects where it
  only knows that they're `MockObject` and not also the class being
  mocked.
* It has the parameter type incorrectly declared for `->with()`.
* Phan loses the generic typing for methods that `@return $this` (it
  wants `@return $this<T>` to tell it the generic still applies).

We can work around all of these issues by generating stubs for PHPUnit,
then munging them to rewrite the `@psalm-` docs to `@phan-` and to fix
the incorrect docs. All this is done by the same script from #36803 that
we already have set up to auto-update WooCommerce stubs.

Then we may as well fix the new issues this turns up:

* Don't try to php-lint stub files. They don't need to be valid PHP as
  long as Phan is happy with them.
* For `yoast/phpunit-polyfills`, prefer the empty versions of the traits
  so we get the PHPUnit versions of things like `assertIsArray()` where
  PHPUnit already gives us `@phan-assert array $actual`.
* Remove lots of Phan suppressions added in previous PRs with comments
  about the PHPUnit issues above.
* Suppress lots of `PhanPluginUnreachableCode` now that Phan knows that
  methods like `->markTestSkipped()` never return.
* Suppress some PhanEmptyFQSENInClasslike warnings issued due to a Phan
  bug when intersection types are passed in callables.
* packages/jetpack-mu-wpcom is missing a dep on automattic/jetpack-status
  which was being hacked around in a test (and presumably only working
  in production because Jetpack is bringing in the package).
* And some other miscellaneous things.

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/8709448100

Upstream-Ref: Automattic/jetpack@3d714eb

composer.json

@@ -8,7 +8,7 @@
 	},
 	"require-dev": {
 		"yoast/phpunit-polyfills": "1.1.0",
-		"automattic/jetpack-changelogger": "^4.2.1"
+		"automattic/jetpack-changelogger": "^4.2.2-alpha"
 	},
 	"autoload": {
 		"classmap": [

vendor/automattic/jetpack-device-detection/composer.json

@@ -8,7 +8,7 @@
 	},
 	"require-dev": {
 		"yoast/phpunit-polyfills": "1.1.0",
-		"automattic/jetpack-changelogger": "^4.2.1"
+		"automattic/jetpack-changelogger": "^4.2.2-alpha"
 	},
 	"suggest": {
 		"automattic/jetpack-autoloader": "Allow for better interoperability with other plugins that use this package."

vendor/composer/installed.json

@@ -7,13 +7,13 @@
             "dist": {
                 "type": "path",
                 "url": "/tmp/jetpack-build/Automattic/jetpack-device-detection",
-                "reference": "2fea361c1c62203aeb07748bdd6780bfcdee1578"
+                "reference": "b7ab04ebbb478bd0d60ef69c0485a4f591d4334b"
             },
             "require": {
                 "php": ">=7.0"
             },
             "require-dev": {
-                "automattic/jetpack-changelogger": "^4.2.1",
+                "automattic/jetpack-changelogger": "^4.2.2-alpha",
                 "yoast/phpunit-polyfills": "1.1.0"
             },
             "suggest": {

vendor/composer/installed.php

@@ -13,7 +13,7 @@
         'automattic/jetpack-device-detection' => array(
             'pretty_version' => '2.1.3',
             'version' => '2.1.3.0',
-            'reference' => '2fea361c1c62203aeb07748bdd6780bfcdee1578',
+            'reference' => 'b7ab04ebbb478bd0d60ef69c0485a4f591d4334b',
             'type' => 'jetpack-library',
             'install_path' => __DIR__ . '/../automattic/jetpack-device-detection',
             'aliases' => array(),