Generate and execute assertion code when running tests #2389

Job	Run time
check-file-patterns	3s
info (8.3)	10s
composer-validate (8.3)	4s
check-makefile (8.3)	16s
check-sri-macros-concat	5s
composer-dependency-analyser (8.3)	12s
lint-latte (8.3)	16s
lint-neon (8.3)	16s
lint-php (8.3)	15s
lint-xml	9s
phpcs (8.3)	20s
phpstan (8.3)	33s
phpstan-vendor (8.3)	1m 16s
psalm (8.3)	22s
tester (8.3)	26s
	4m 43s

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