chore: fix last clippy lints and enforce in CI #2877

Job	Run time
msrv	55s
minimal	11s
docs	25s
clippy	22s
quickchecking	19s
test-book	16s
test-expectations (ubuntu-latest)	50s
test (ubuntu-latest, 9.0, 0, 0, 0, 0)	1m 49s
test-expectations (macos-latest)	39s
test-no-headers	26s
test (ubuntu-latest, 9.0, 0, 0, 1, 0)	1m 43s
rustfmt	10s
test (ubuntu-latest, 9.0, 0, 1, 0, 0)	2m 3s
test (ubuntu-latest, 9.0, 0, 1, 1, 0)	1m 59s
test (ubuntu-latest, 9.0, 1, 0, 0, 0)	2m 12s
test (ubuntu-latest, 9.0, 1, 0, 1, 0)	2m 23s
test (ubuntu-latest, 9.0, 1, 1, 0, 0)	2m 9s
test (ubuntu-latest, 9.0, 1, 1, 1, 0)	2m 31s
test (ubuntu-latest, 16.0, 0, 0, 0, 0)	4m 17s
test (ubuntu-latest, 16.0, 0, 0, 1, 0)	4m 10s
test (ubuntu-latest, 16.0, 0, 1, 0, 0)	4m 16s
test (ubuntu-latest, 16.0, 0, 1, 1, 0)	5m 26s
test (ubuntu-latest, 16.0, 1, 0, 0, 0)	5m 13s
test (ubuntu-latest, 16.0, 1, 0, 1, 0)	4m 59s
test (ubuntu-latest, 16.0, 1, 1, 0, 0)	5m 33s
test (ubuntu-latest, 16.0, 1, 1, 1, 0)	4m 50s
test (ubuntu-latest, 16.0, 0, 0, 1)	2m 30s
test (macos-latest, 16.0, 0, 0, 0)	2m 10s
success	1s
	1h 4m 47s

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