Update SchemaState Process to remove timeout (#39139)

As shown in Symphony Process docs: https://symfony.com/doc/current/components/process.html#process-timeout

All Process spawned have a default timeout of 60 seconds. For a pg_dump script. 60 seconds might or might not be enough especially if this is run in a CI/CD envrionment where process contention (in shared or virtual hardware) is an issue.

Removing the timeout is great because running migrations could be seen as a long lived process by most users and developers.

src/Illuminate/Database/Schema/SchemaState.php

@@ -58,7 +58,7 @@ public function __construct(Connection $connection, Filesystem $files = null, ca
         $this->files = $files ?: new Filesystem;
 
         $this->processFactory = $processFactory ?: function (...$arguments) {
-            return Process::fromShellCommandline(...$arguments);
+            return Process::fromShellCommandline(...$arguments)->setTimeout(null);
         };
 
         $this->handleOutputUsing(function () {