[K/N] Tests for volatile

^KT-54944

compiler/testData/codegen/box/volatile/volatileBool.kt

@@ -0,0 +1,19 @@
+// WITH_STDLIB
+// IGNORE_BACKEND: WASM, JS
+// IGNORE_BACKEND_K1: JS_IR
+// !API_VERSION: 1.9
+
+import kotlin.concurrent.*
+
+@OptIn(kotlin.ExperimentalStdlibApi::class)
+class BoolWrapper(@Volatile var x: Boolean)
+
+val global = BoolWrapper(false)
+
+fun box() : String {
+    val local = BoolWrapper(false)
+    if (global.x || local.x) return "FAIL"
+    global.x = true
+    local.x = true
+    return if (global.x && local.x) "OK" else "FAIL"
+}