minor #28448 [Console] Fix input values allowed types (chalasr)

This PR was merged into the 2.8 branch.

Discussion
----------

[Console] Fix input values allowed types

| Q             | A
| ------------- | ---
| Branch?       | 2.8
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Continuation of #28374

Commits
-------

0c16cd9fae [Console] Fix input values allowed types

src/Symfony/Component/Console/Input/InputArgument.php

@@ -86,7 +86,7 @@ class InputArgument
     /**
      * Sets the default value.
      *
-     * @param mixed $default The default value
+     * @param string|string[] $default The default value
      *
      * @throws LogicException When incorrect default value is given
      */
@@ -110,7 +110,7 @@ class InputArgument
     /**
      * Returns the default value.
      *
-     * @return mixed The default value
+     * @return string|string[] The default value
      */
     public function getDefault()
     {

src/Symfony/Component/Console/Input/InputInterface.php

@@ -83,7 +83,7 @@ interface InputInterface
      *
      * @param string $name The argument name
      *
-     * @return mixed The argument value
+     * @return string|string[] The argument value
      *
      * @throws InvalidArgumentException When argument given doesn't exist
      */
@@ -120,7 +120,7 @@ interface InputInterface
      *
      * @param string $name The option name
      *
-     * @return mixed The option value
+     * @return string|string[]|bool The option value
      *
      * @throws InvalidArgumentException When option given doesn't exist
      */

src/Symfony/Component/Console/Input/InputOption.php

@@ -149,7 +149,7 @@ class InputOption
     /**
      * Sets the default value.
      *
-     * @param mixed $default The default value
+     * @param string|string[]|bool $default The default value
      *
      * @throws LogicException When incorrect default value is given
      */
@@ -173,7 +173,7 @@ class InputOption
     /**
      * Returns the default value.
      *
-     * @return mixed The default value
+     * @return string|string[]|bool The default value
      */
     public function getDefault()
     {