JS: prohibit using experimental coroutines from 1.3

compiler/testData/diagnostics/testsWithJsStdLib/module/coroutineProhibitedMigration.kt

@@ -0,0 +1,6 @@
+import kotlin.coroutines.experimental.*
+import kotlin.coroutines.experimental.intrinsics.*
+
+suspend fun dummy(): String = <!DEPRECATION_ERROR!>suspendCoroutine<!> {
+    it.resume("OK")
+}

compiler/testData/diagnostics/testsWithJsStdLib/module/coroutineProhibitedMigration.txt

@@ -0,0 +1,3 @@
+package
+
+public suspend fun dummy(): kotlin.String