Add box test for KT-36897

compiler/testData/codegen/box/coroutines/controlFlow/suspendInStringTemplate.kt

@@ -0,0 +1,29 @@
+// WITH_RUNTIME
+// WITH_COROUTINES
+// COMMON_COROUTINES_TEST
+// IGNORE_BACKEND: JS
+import helpers.*
+import COROUTINES_PACKAGE.*
+import COROUTINES_PACKAGE.intrinsics.*
+
+// KT-36897
+
+suspend fun foo(str: String) = str
+
+suspend fun test(): String {
+    return foo("""${foo("O")}${foo("K")}""")
+}
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(EmptyContinuation)
+}
+
+fun box(): String {
+    var result = "FAIL"
+
+    builder {
+        result = test()
+    }
+
+    return result
+}