Deny clippy::large_futures and fix +nightly lint #5355

Job	Run time
SDK docs	1m 25s
Code Style	58s
Lint	33s
Get minimum supported rust version	14s
WASM Tests (stable, false)	1m 15s
E2E Tests (stable, false)	1m 11s
WASM Tests (1.76, false)	1m 16s
SDK Tests (stable, false)	2m 19s
E2E Tests (1.76, false)	1m 14s
WASM Tests (nightly, true)	2m 19s
SDK Tests (1.76, false)	2m 31s
E2E Tests (nightly, true)	1m 13s
SDK Tests (nightly, true)	2m 8s
	18m 36s

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