Add test for deserializing pageable body #5364

Job	Run time
SDK docs	1m 34s
Get minimum supported rust version	14s
Lint	35s
Code Style	1m 4s
SDK Tests (stable, false)	2m 50s
SDK Tests (1.76, false)	4m 0s
WASM Tests (stable, false)	1m 58s
SDK Tests (nightly, true)	3m 37s
E2E Tests (stable, false)	1m 9s
E2E Tests (1.76, false)	1m 55s
E2E Tests (nightly, true)	3m 59s
WASM Tests (1.76, false)	1m 9s
WASM Tests (nightly, true)	2m 31s
	26m 35s

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