fix(upgrade): run rector tests in separate processes to prevent OOM at 1G memory limit

Author: laylatichy

packages/upgrade/tests/Tempest20/Tempest20RectorTest.php

@@ -2,9 +2,11 @@
 
 namespace Tempest\Upgrade\Tests\Tempest20;
 
+use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;
 use PHPUnit\Framework\TestCase;
 use Tempest\Upgrade\Tests\RectorTester;
 
+#[RunTestsInSeparateProcesses]
 final class Tempest20RectorTest extends TestCase
 {
     private RectorTester $rector {

packages/upgrade/tests/Tempest28/Tempest28RectorTest.php

@@ -2,9 +2,11 @@
 
 namespace Tempest\Upgrade\Tests\Tempest28;
 
+use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;
 use PHPUnit\Framework\TestCase;
 use Tempest\Upgrade\Tests\RectorTester;
 
+#[RunTestsInSeparateProcesses]
 final class Tempest28RectorTest extends TestCase
 {
     private RectorTester $rector {

packages/upgrade/tests/Tempest3/Tempest3RectorTest.php

@@ -2,9 +2,11 @@
 
 namespace Tempest\Upgrade\Tests\Tempest3;
 
+use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;
 use PHPUnit\Framework\TestCase;
 use Tempest\Upgrade\Tests\RectorTester;
 
+#[RunTestsInSeparateProcesses]
 final class Tempest3RectorTest extends TestCase
 {
     private RectorTester $rector {

packages/upgrade/tests/Tempest34/Tempest34RectorTest.php

@@ -2,9 +2,11 @@
 
 namespace Tempest\Upgrade\Tests\Tempest34;
 
+use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;
 use PHPUnit\Framework\TestCase;
 use Tempest\Upgrade\Tests\RectorTester;
 
+#[RunTestsInSeparateProcesses]
 final class Tempest34RectorTest extends TestCase
 {
     private RectorTester $rector {