Prevent memory exhaustion when generating TIA graphs with PCOV (#1875)

* fix(tia): preserve memory limit during pcov restart

* chore: update test expectations

* fix: stabilize tia replay test in ci

tests/Unit/Restarters/PcovRestarter.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+use Pest\Restarters\PcovRestarter;
+use Symfony\Component\Process\Process;
+
+it('preserves the active memory limit in the restarted process', function (): void {
+    $originalMemoryLimit = ini_get('memory_limit');
+
+    try {
+        ini_set('memory_limit', '1234M');
+
+        $command = new ReflectionMethod(PcovRestarter::class, 'command')
+            ->invoke(new PcovRestarter, __DIR__, ['-r', 'fwrite(STDOUT, (string) ini_get("memory_limit"));']);
+
+        assert(is_array($command));
+
+        $process = new Process($command);
+        $process->mustRun();
+
+        expect($process->getOutput())->toBe('1234M');
+    } finally {
+        ini_set('memory_limit', (string) $originalMemoryLimit);
+    }
+});