Deny clippy::large_futures and fix +nightly lint #5357

Job	Run time
Lint	30s
SDK docs	1m 26s
Get minimum supported rust version	12s
Code Style	59s
E2E Tests (stable, false)	2m 0s
SDK Tests (stable, false)	2m 47s
E2E Tests (1.76, false)	2m 35s
WASM Tests (stable, false)	2m 26s
SDK Tests (1.76, false)	3m 48s
E2E Tests (nightly, true)	2m 22s
WASM Tests (1.76, false)	1m 10s
SDK Tests (nightly, true)	3m 12s
WASM Tests (nightly, true)	1m 11s
	24m 38s

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