refactor(objc): use if let Some in for-loop instead of ? #3934

Job	Run time
TypeScript type check	6m 30s
Verify dynamic imports	5s
Lint	7m 2s
Rust compile check	55s
Security audit	7m 10s
Native host build (windows-latest)	5m 58s
Native host build (macos-latest)	5m 31s
Native host build (ubuntu-latest)	3m 24s
Pre-publish benchmark gate	10m 10s
Engine parity (ubuntu-latest)	6m 29s
Engine parity (macos-latest)	14m 38s
Test Node 22 (windows-latest)	15m 52s
Test Node 22 (ubuntu-latest)	8m 26s
Engine parity (windows-latest)	12m 17s
Test Node 22 (macos-latest)	10m 54s
CI Testing Pipeline	4s
	1h 55m 25s

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