Support generic types in `crystal tool hierarchy` #9388

Job	Run time
check_format	2m 14s
x86_64-gnu-test (1.2.2, USE_PCRE1=true)	44m 44s
x86_64-gnu-test (1.3.2, USE_PCRE1=true)	42m 28s
x86_64-gnu-test (1.4.1, USE_PCRE1=true)	38m 48s
x86_64-gnu-test (1.5.1, USE_PCRE1=true)	38m 5s
x86_64-gnu-test (1.6.2, USE_PCRE1=true)	52m 17s
x86_64-gnu-test (1.0.0, FLAGS=-Dwithout_ffi USE_PCRE1=true)	49m 56s
x86_64-gnu-test (1.1.1, FLAGS=-Dwithout_ffi USE_PCRE1=true)	46m 43s
x86_64-gnu-test (1.7.3)	41m 33s
x86_64-gnu-test (1.8.2)	38m 2s
x86_64-gnu-test (1.9.2)	52m 15s
x86_64-gnu-test-preview_mt	6m 26s
x86_64-musl-test	5m 5s
deploy_api_docs	0s
	7h 38m 36s

Provide feedback