chore: use foundry fs #9124

Job	Run time
doc tests	6m 22s
fmt	16s
feature checks	4m 4s
clippy	2m 0s
forge fmt	2m 0s
build matrices	6s
build tests (ubuntu-latest, x86_64-unknown-linux-gnu)	12m 24s
test unit	34s
test integration (1/3)	7m 49s
test integration (2/3)	4m 33s
test integration (3/3)	4m 57s
test integration/issue-repros (1/2)	3m 39s
test integration/issue-repros (2/2)	3m 42s
test integration/forge-std	3m 21s
test integration/external (1/2)	5m 34s
test integration/external (2/2)	1m 59s
	1h 3m 20s

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