minor symfony#61568 [Console] Harden array type for test-related user inputs (eliashaeussler)

This PR was submitted for the 6.4 branch but it was merged into the 7.4 branch instead.

Discussion
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[Console] Harden array type for test-related user inputs

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Issues        | Fix #...
| License       | MIT

User inputs must be strings, otherwise they cannot be properly written to the `php://memory` stream (because of the `str_contains` check here: https://github.com/symfony/symfony/blob/v6.4.25/src/Symfony/Component/Console/Tester/TesterTrait.php#L173). Using the hardened typed annotation, static code analyzers may assist developers in using correct array values.

Commits
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e8ca032 [Console] Harden array type for test-related user inputs

Author: nicolas-grekas

src/Symfony/Component/Console/Tester/TesterTrait.php

@@ -24,6 +24,10 @@
 trait TesterTrait
 {
     private StreamOutput $output;
+
+    /**
+     * @var list<string>
+     */
     private array $inputs = [];
     private bool $captureStreamsIndependently = false;
     private InputInterface $input;
@@ -107,8 +111,8 @@ public function assertCommandIsSuccessful(string $message = ''): void
     /**
      * Sets the user inputs.
      *
-     * @param array $inputs An array of strings representing each input
-     *                      passed to the command input stream
+     * @param list<string> $inputs An array of strings representing each input
+     *                             passed to the command input stream
      *
      * @return $this
      */
@@ -161,6 +165,8 @@ private function initOutput(array $options): void
     }
 
     /**
+     * @param list<string> $inputs
+     *
      * @return resource
      */
     private static function createStream(array $inputs)