Add Support for Threadsafe and NotThreadSafe annotations #386

Job	Run time
Java tests (swift:6.0.2 jdk:Corretto os:jammy)	6m 26s
Swift tests (swift:6.0.2 jdk:Corretto os:jammy)	3m 50s
Verify Samples (swift:6.0.2 jdk:Corretto os:jammy)	12m 40s
soundness / Unacceptable language check	3s
soundness / Documentation check	41s
soundness / API breakage check	0s
soundness / Broken symlinks check	5s
soundness / Format check	0s
soundness / License headers check	5s
soundness / Python lint check	8s
soundness / Shell check	37s
soundness / YAML lint check	4s
	24m 39s

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