test(dump): replace @dataProvider annotations with #[DataProvider] attributes

The installed PHPUnit (12.x, ahead of this plugin's ^10.0 dev
constraint) no longer parses the @dataProvider PHPDoc annotation,
so both tests silently ran their data-provider method with zero
arguments and failed with ArgumentCountError.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/Service/MySqlVariantTest.php

@@ -3,13 +3,12 @@
 namespace AeonDumpManager\Tests\Service;
 
 use AeonDumpManager\Service\MySqlVariant;
+use PHPUnit\Framework\Attributes\DataProvider;
 use PHPUnit\Framework\TestCase;
 
 class MySqlVariantTest extends TestCase
 {
-    /**
-     * @dataProvider versionProvider
-     */
+    #[DataProvider('versionProvider')]
     public function testIsMariaDb(string $version, bool $expected): void
     {
         self::assertSame($expected, MySqlVariant::isMariaDb($version));