feat: Add SIGTERM support #8344

Job	Run time
pod lint Sentry/HybridSDK	2m 6s
pod lint Sentry dynamic ios	4m 15s
pod lint Sentry static ios	3m 35s
Swift Lint	16s
pod lint Sentry dynamic macos	4m 59s
pod lint Sentry static macos	4m 10s
Xcode Analyze	6m 35s
pod lint Sentry dynamic tvos	3m 7s
pod lint Sentry static tvos	3m 26s
pod lint Sentry dynamic watchos	3m 3s
pod lint Sentry static watchos	3m 3s
pod lint SentrySwiftUI dynamic ios	1m 55s
pod lint SentrySwiftUI static ios	1m 43s
pod lint SentrySwiftUI dynamic macos	2m 5s
pod lint SentrySwiftUI static macos	2m 31s
pod lint SentrySwiftUI dynamic tvos	1m 53s
pod lint SentrySwiftUI static tvos	2m 21s
pod lint SentrySwiftUI dynamic watchos	1m 29s
pod lint SentrySwiftUI static watchos	1m 32s
	54m 4s

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