PHP 8.4 support

[kkmuffme]

• https://wiki.php.net/rfc/deprecations_php_8_4

• https://github.com/php/php-src/blob/php-8.4.0RC1/UPGRADING#L102 (e.g. The type of PHP_DEBUG and PHP_ZTS constants changed to bool.)

• update ProjectAnalyzer private const PHP_SUPPORTED_VERSIONS_REGEX = '^(5\.[456]|7\.[01234]|8\.[0123])(\..*)?$';

• update composer.json

• all changes done for 8.2/8.3 in PR added GitHub CI for unit tests with PHP 8.2 and 8.3 #10028 need to be done for 8.4 too

[psalm-github-bot]

Hey @kkmuffme, can you reproduce the issue on https://psalm.dev? These will be used as phpunit tests when implementing the feature or fixing this bug.

[edsrzf]

#11166 and #11168 fix a couple warnings I got when running Psalm with PHP 8.4.

[llaville]

Psalm error handler (https://github.com/vimeo/psalm/blob/5.26.1/src/Psalm/Internal/ErrorHandler.php#L62) do not allow to disable deprecations at runtime ( php -d error_reporting=24575 vendor/bin/psalm )

[Bolkarr]

"This version of Nextcloud is not compatible with PHP>=8.4.
You are currently running 8.4.1."

Is there a distinction between 8.4 and 8.4.1 ?
I am on 30.0.3 RC2