…le" to detach a subprocess (andrei0x309)

This PR was merged into the 5.2-dev branch.

Discussion
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[Process] allow setting options esp. "create_new_console" to detach a subprocess

Process.php to include support for create_new_console (Windows ONLY)

| Q             | A
| ------------- | ---
| Branch?       | master <!-- see below -->
| Bug fix?      |  no
| New feature?  | yes <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | #36583 <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->

Based on this issue: symfony/symfony#36583
I created a quick repo [ https://github.com/andrei0x309/tets_sym_proc]( https://github.com/andrei0x309/tets_sym_proc) to illustrate
how this feature can be used, it essentially lets you run something even if your main script has terminated.

It is useful if you want to create something like
`new Process(['php', 'script_with_long_execution_time.php']);`
This was impossible to do on windows until the **create_new_console** flag was added in PHP 7.4.4.
With this feature Process can be used like this:

```
// Start a process and detach form it on Win only
$process = new Process(['php', 'worker.php']);
$process->setOptions(["create_new_console" => true]); // New method I added
$process->disableOutput();
$process->start();
Process Class behavior will never change if the user doesn't use setWinOptions()
```

Commits
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e9ab235b66 [Process] allow setting options esp. "create_new_console" to detach a subprocess