[12.x] Fix TestResponse::assertSessionMissing() when given an array of keys (#55800)

* [12.x] Fix `TestResponse::assertSessionMissing()` when given an array of keys

PR #55763 remove `else` from `is_array($key)` condition which cause
regression bug to occur on existing application.

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

* wip

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

* wip

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>

* Update tests/Testing/TestResponseTest.php

Co-authored-by: Sebastian Hädrich <11225821+shaedrich@users.noreply.github.com>

---------

Signed-off-by: Mior Muhammad Zaki <crynobone@gmail.com>
Co-authored-by: Sebastian Hädrich <11225821+shaedrich@users.noreply.github.com>

Author: crynobone

src/Illuminate/Testing/TestResponse.php

@@ -1670,6 +1670,8 @@ public function assertSessionMissing($key, $value = null)
             foreach ($key as $value) {
                 $this->assertSessionMissing($value);
             }
+
+            return $this;
         }
 
         if (is_null($value)) {

tests/Testing/TestResponseTest.php

@@ -27,6 +27,7 @@
 use JsonSerializable;
 use Mockery as m;
 use PHPUnit\Framework\AssertionFailedError;
+use PHPUnit\Framework\Attributes\TestWith;
 use PHPUnit\Framework\ExpectationFailedException;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\HttpFoundation\BinaryFileResponse;
@@ -2807,7 +2808,10 @@ public function testAssertSessionMissing()
         $response->assertSessionMissing('foo');
     }
 
-    public function testAssertSessionMissingValue()
+    #[TestWith(['foo', 'badvalue'])]
+    #[TestWith(['foo', null])]
+    #[TestWith([['foo', 'bar'], null])]
+    public function testAssertSessionMissingValue(array|string $key, mixed $value)
     {
         $this->expectException(AssertionFailedError::class);
 
@@ -2816,7 +2820,7 @@ public function testAssertSessionMissingValue()
         $store->put('foo', 'goodvalue');
 
         $response = TestResponse::fromBaseResponse(new Response());
-        $response->assertSessionMissing('foo', 'badvalue');
+        $response->assertSessionMissing($key, $value);
     }
 
     public function testAssertSessionHasInput()