Upgrade to PHP 8.4 #2487

Job	Run time
check-sri-macros-concat	7s
check-makefile (8.3)	11s
check-file-patterns	6s
check-makefile (8.4)	9s
composer-dependency-analyser (8.3)	10s
composer-dependency-analyser (8.4)	12s
composer-validate (8.3)	5s
composer-validate (8.4)	6s
info (8.3)	6s
lint-latte (8.3)	9s
info (8.4)	10s
lint-neon (8.3)	8s
lint-latte (8.4)	9s
lint-neon (8.4)	10s
lint-php (8.3)	17s
lint-xml	13s
lint-php (8.4)	13s
phpcs (8.3)	13s
phpstan (8.3)	25s
phpcs (8.4)	16s
phpstan-vendor (8.3)	1m 13s
psalm (8.3)	24s
phpstan-vendor (8.4)	1m 11s
tester (8.3)	16s
phpstan (8.4)	26s
tester (8.4)	18s
	7m 23s

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