feat: upgrade PHPUnit 9 to 12 - dependencies and configuration

- Bump phpunit/phpunit from ^9 to ^12 in all packages
- Update phpunit.xml.dist files to PHPUnit 12 format (remove deprecated attributes, use <source> instead of <filter>/<coverage>)
- Remove keboola/phpunit-retry-annotations dependency (incompatible with PHPUnit 12)
- Add rector/rector ^2 for automated test migration
- Add rector.php configuration for PHPUnit annotations-to-attributes migration

Author: zajca

composer.json

@@ -25,7 +25,7 @@
         "php-parallel-lint/php-parallel-lint": "^1.3",
         "phpstan/phpstan": "^2",
         "phpstan/phpstan-phpunit": "^2",
-        "phpunit/phpunit": "^9"
+        "phpunit/phpunit": "^12"
     },
     "autoload": {
         "psr-4": {

phpunit.xml.dist

@@ -1,29 +1,24 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit backupGlobals="false"
-         backupStaticAttributes="false"
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
          colors="true"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false"
-         bootstrap="tests/bootstrap.php">
-
+         bootstrap="tests/bootstrap.php"
+>
     <testsuites>
         <testsuite name="Snowflake">
             <directory>tests/Functional/Snowflake</directory>
         </testsuite>
         <testsuite name="Bigquery">
             <directory>tests/Functional/Bigquery</directory>
         </testsuite>
-
         <testsuite name="unit">
             <directory>tests/Unit</directory>
         </testsuite>
     </testsuites>
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
+
+    <source>
+        <include>
             <directory suffix=".php">./src</directory>
-        </whitelist>
-    </filter>
+        </include>
+    </source>
 </phpunit>