Start testing on PHP 8.4 except Psalm #2398

Job	Run time
check-makefile (8.3)	14s
check-file-patterns	1s
check-makefile (8.4)	16s
check-sri-macros-concat	4s
composer-validate (8.3)	4s
lint-latte (8.3)	16s
composer-validate (8.4)	6s
info (8.3)	16s
lint-latte (8.4)	14s
info (8.4)	26s
lint-neon (8.3)	15s
lint-xml	10s
lint-neon (8.4)	14s
lint-php (8.3)	18s
lint-php (8.4)	18s
composer-dependency-analyser (8.3)	23s
composer-dependency-analyser (8.4)	13s
phpcs (8.3)	28s
phpcs (8.4)	23s
phpstan-vendor (8.3)	1m 18s
phpstan (8.3)	30s
phpstan-vendor (8.4)	1m 12s
phpstan (8.4)	30s
psalm (8.3)	20s
tester (8.3)	31s
tester (8.4)	26s
	9m 26s

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