feature #4265 Migrate NodeTestCase to static data providers (derrabus)

This PR was merged into the 3.x branch.

Discussion
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Migrate NodeTestCase to static data providers

PHPUnit 11 requires data providers to be static. This PR prepares our abstract `NodeTestCase` by deprecating the non-static `getTests()` and adding a static `provideTests()` as a replacement. I've also added PHPUnit attributes which newer PHPUnit releases prefer over PHPDoc annotations.

Commits
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f555a33c Migrate NodeTestCase to static data providers

tests/Node/ModuleTest.php

@@ -23,8 +23,6 @@ use Twig\Node\Node;
 use Twig\Node\SetNode;
 use Twig\Node\TextNode;
 use Twig\Source;
-use Twig\Template;
-use Twig\TemplateWrapper;
 use Twig\Test\NodeTestCase;
 
 class ModuleTest extends NodeTestCase
@@ -46,7 +44,7 @@ class ModuleTest extends NodeTestCase
         $this->assertEquals($source->getName(), $node->getTemplateName());
     }
 
-    public function getTests()
+    public static function provideTests(): iterable
     {
         $twig = new Environment(new ArrayLoader(['foo.twig' => '{{ foo }}']));