feat(rust): Enable the 'arithmetic-side-effects' Clippy lint #2623

Job	Run time
ci / discover	18s
ci / check / .+check-bash	53s
ci / check / .+check-markdown	36s
ci / check / .+check-spelling	30s
ci / check / ./examples/go+check	26s
ci / check / ./examples/postgresql+check	49s
ci / check / ./examples/python+check	39s
ci / check / ./examples/rust+check	57s
ci / check / ./utilities/cql-to-d2+check	36s
ci / check / ./utilities/earthly-cache-watcher+check	36s
ci / check / ./utilities/fetcher+check	29s
ci / check / ./utilities/jorm-metrics-server+check	38s
ci / build / ./examples/go+build	46s
ci / build / ./examples/postgresql+build	2m 56s
ci / build / ./examples/rust+build	59s
ci / build / ./examples/wasm/c+build	28s
ci / build / ./utilities/fetcher+build	28s
ci / build / ./utilities/jorm-metrics-server+build	39s
ci / package	0s
ci / test	0s
ci / release	0s
ci / docs	0s
ci / deploy	0s
ci / final	0s
	13m 43s

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