refactor: Take `impl BlockStore` instead of `&impl BlockStore` in general #71

Job	Run time
run-cargo-tests (stable)	1m 0s
run-checks (stable)	2m 33s
run-cargo-tests (nightly)	1m 50s
run-checks (nightly)	57s
run-checks (1.75)	53s
run-headless-tests (ubuntu-latest, firefox)	22s
run-headless-tests (ubuntu-latest, chrome)	27s
	8m 2s

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