Support PHP 8.2 and work around reporting dynamic properties

[clue]

This changeset adds support for PHP 8.2 and works around reporting any dynamic properties. This is part 7 of reviving Ratchet as discussed in #1054, unblocking more future progress.

With these changes applied, the existing test suite recently updated with #1094, #1093 and #1092 now works fine on PHP 8.2 at last. Once merged, I'll use this as a starting point to add newer PHP 8.3+ version support as discussed in #1003 and elsewhere.

Together with the recent Symfony 6 improvements from #1095, this PR also unblocks upcoming support for Symfony 7 (which requires PHP 8.2+). Once both are merged, I'll use this as a starting point to add newer Symfony 7 version support as discussed in #1045 and elsewhere.

Note that this employs a number of workarounds to support avoid raising deprecation notices when assigning dynamic properties on PHP 8.2+. Most notably, this makes use of the #[\AllowDynamicProperties] attribute where needed, plus a custom error handler ignoring notices where dynamic properties are used on vendor code. While this isn't exactly perfect, I think it's good enough to get this working on newer PHP versions again without applying a major refactoring and introducing any BC breaks. Future PRs to improve this very much welcome.

Overall, this still requires a massive effort. If you want to support this project, please consider sponsoring @reactphp ❤️

Builds on top of #1094, #1093, #1092, #1091 and #1088, one step closer to reviving Ratchet as discussed in #1054

[PaulRotmann]

Nice!

[clue]

Let's get this shipped, so we can focus on newer PHP versions in a follow-up