Run tests against PHP 8.2

[swissspidy]

Context

PHP 8.2 is expected to be released at the end of November 2022.

Core is now also running tests against PHP 8.2, see https://core.trac.wordpress.org/changeset/53922

Summary

Enables running the PHP integration and unit tests on PHP 8.2.

Relevant Technical Choices

To-do

User-facing changes

N/A

Testing Instructions

• This is a non-user-facing change and requires no QA

This PR can be tested by following these steps:

Reviews

Does this PR have a security-related impact?

No

Does this PR change what data or activity we track or use?

No

Does this PR have a legal-related impact?

No

Checklist

• This PR addresses an existing issue and I have linked this PR to it in ZenHub
• I have tested this code to the best of my abilities
• I have verified accessibility to the best of my abilities (docs)
• I have verified i18n and l10n (translation, right-to-left layout) to the best of my abilities
• This code is covered by automated tests (unit, integration, and/or e2e) to verify it works as intended (docs)
• I have added documentation where necessary
• I have added a matching Type: XYZ label to the PR

---

See #12163

[spacedmonkey]

Seems to be a number of deprecated warnings.

PHP Deprecated:  Creation of dynamic property Google\Web_Stories_Dependencies\AmpProject\Dom\Document::$head is deprecated in /home/runner/work/web-stories-wp/web-stories-wp/third-party/vendor/ampproject/amp-toolbox/src/Dom/Document/Filter/DeduplicateTag.php on line 65
PHP Deprecated:  Creation of dynamic property Google\Web_Stories_Dependencies\AmpProject\Dom\Document::$body is deprecated in /home/runner/work/web-stories-wp/web-stories-wp/third-party/vendor/ampproject/amp-toolbox/src/Dom/Document/Filter/DeduplicateTag.php on line 65
PHP Deprecated:  Creation of dynamic property Google\Web_Stories_Dependencies\AmpProject\Dom\Document::$html is deprecated in /home/runner/work/web-stories-wp/web-stories-wp/third-party/vendor/ampproject/amp-toolbox/src/Dom/Document.php on line 699
PHP Deprecated:  Creation of dynamic property Google\Web_Stories_Dependencies\AmpProject\Dom\Document::$xpath is deprecated in /home/runner/work/web-stories-wp/web-stories-wp/third-party/vendor/ampproject/amp-toolbox/src/Dom/Document.php on line 687

[swissspidy]

Yes. Context:

• PHP 8.2 Compatibility #12163
• PHP 8.2 Compatibility ampproject/amp-toolbox-php#532
• PHP 8.2 Improvements ampproject/amp-toolbox-php#533
• PHP 8.1 / 8.2 Compatibility ampproject/amp-wp#7225
• https://core.trac.wordpress.org/ticket/56009

[swissspidy]

Tests are passing now, just with a ton of warnings from the aforementioned dependencies.