ci: Use taiki-e/github-actions/install-rust action #2924

Job	Run time
test (1.56)	1m 29s
test (stable)	45s
test (beta)	43s
test (nightly)	2m 7s
docs / docs	17s
check-external-types / check-external-types	17s
deny / deny	13s
miri / miri	1m 8s
msrv / msrv	6m 13s
tidy / tidy	1m 12s
	14m 24s

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