[K/N] Deprecate SharedImmutable annotation #KT-57837

As a part of efforts to stabilize Native stdlib.

kotlin-native/backend.native/tests/runtime/workers/worker10.kt

@@ -19,7 +19,6 @@ var topStringVar = "string"
 val topSharedStringWithGetter: String
         get() = "top"
 val topData = Data(42)
-@SharedImmutable
 val topSharedData = Data(43)
 
 @Test fun runTest1() {
@@ -88,7 +87,6 @@ val topSharedData = Data(43)
 }
 
 val atomicRef = AtomicReference<Any?>(Any().freeze())
-@SharedImmutable
 val stableRef = StableRef.create(Any().freeze())
 val semaphore = AtomicInt(0)
 

kotlin-native/backend.native/tests/runtime/workers/worker11.kt

@@ -51,7 +51,6 @@ fun initJobs(count: Int) = Array<Job?>(count) { i -> Job(i, i * 2, i)}
 
 val COUNT = 2
 
-@SharedImmutable
 val counters = Array(COUNT) { AtomicInt(0) }
 
 @Test fun runTest1() {