Make Perception warning suppression opt-in

[johnnewman-square]

PRs #389 and #390 automatically suppressed Perception runtime warnings on platforms using native Observation. This restores the warnings by default while preserving an opt-in suppression path.

Summary

• Add Runtime.Configuration.suppressPerceptionCheckingWhenUsingObservation, defaulting to false
• Continue normal Store access unless suppression is explicitly enabled
• Apply suppression only in debug builds on iOS 17+, macOS 14+, tvOS 17+, and watchOS 10+
• Cover both direct state reads and child Store wrapper access
• Add tests for the default warning behavior and opt-in suppression

Test plan

• Run StoreTests on iOS 17.5 — 25 passed
• Run StoreTests on iOS 16.2 — passed with 8 expected skips
• Run the ObservableComposition sample app on iOS 17 to ensure the warnings are occurring by default.

Checklist

• Unit Tests
• UI Tests (not applicable)
• Snapshot Tests (not applicable)
• I have made corresponding changes to the documentation