[loader-v2] Small cleanups & tests #70524

Job	Run time
file_change_determinator	9s
rust-doc-tests	4m 50s
rust-consensus-only-unit-test	0s
rust-consensus-only-smoke-test	0s
rust-unit-tests	0s
rust-build-cached-packages	2m 7s
general-lints	27s
rust-cargo-deny	1m 36s
rust-check-merge-base	1m 43s
rust-cryptohasher-domain-separation-check	0s
rust-lints	3m 35s
rust-smoke-tests	27m 13s
rust-targeted-unit-tests	19m 54s
	1h 1m 34s

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