Fix failing test because of slightly different diagnostics for LV=1.2

There are no `DEBUG_INFO_MISSING_UNRESOLVED` diagnostics for this test
 if one runs it under LV=1.2. These diagnostics are not crucial
 for the test (especially for version 1.2), so use it only with
 the latest stable version

 Plus, reuse test-data to check behavior in new inference

compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt

@@ -1,9 +1,8 @@
-// !LANGUAGE: -NewInference
+// !WITH_NEW_INFERENCE
 // SKIP_TXT
 // WITH_RUNTIME
-// COMMON_COROUTINES_TEST
 
-import COROUTINES_PACKAGE.*
+import kotlin.coroutines.*
 
 interface Job : CoroutineContext.Element {}
 interface Deferred<out T> : Job {

compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292_ni.kt

@@ -1,19 +0,0 @@
-// !LANGUAGE: +NewInference
-// SKIP_TXT
-// WITH_RUNTIME
-
-import kotlin.coroutines.*
-
-interface Job : CoroutineContext.Element {}
-interface Deferred<out T> : Job {
-    suspend fun await(): T
-}
-fun <T> async(<!UNUSED_PARAMETER!>block<!>: suspend () -> T): Deferred<T> = TODO()
-
-suspend fun fib(n: Long) =
-    async {
-        when {
-            n < 2 -> n
-            else -> <!TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM!><!DEBUG_INFO_MISSING_UNRESOLVED!>fib<!>(<!DEBUG_INFO_MISSING_UNRESOLVED!>n<!> <!DEBUG_INFO_MISSING_UNRESOLVED!>-<!> 1)<!>.<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>await<!>() <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>+<!> fib(n - 2).<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE!>await<!>()
-        }
-    }

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestWithStdLibGenerated.java

@@ -1544,18 +1544,8 @@ public class DiagnosticsTestWithStdLibGenerated extends AbstractDiagnosticsTestW
         }
 
         @TestMetadata("kt18292.kt")
-        public void testKt18292_1_2() throws Exception {
+        public void testKt18292() throws Exception {
-            runTestWithPackageReplacement("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt", "kotlin.coroutines.experimental");
+            runTest("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt");
-        }
-
-        @TestMetadata("kt18292.kt")
-        public void testKt18292_1_3() throws Exception {
-            runTestWithPackageReplacement("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt", "kotlin.coroutines");
-        }
-
-        @TestMetadata("kt18292_ni.kt")
-        public void testKt18292_ni() throws Exception {
-            runTest("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292_ni.kt");
         }
 
         @TestMetadata("kt28658.kt")

compiler/tests/org/jetbrains/kotlin/checkers/javac/DiagnosticsTestWithStdLibUsingJavacGenerated.java

@@ -1544,18 +1544,8 @@ public class DiagnosticsTestWithStdLibUsingJavacGenerated extends AbstractDiagno
         }
 
         @TestMetadata("kt18292.kt")
-        public void testKt18292_1_2() throws Exception {
+        public void testKt18292() throws Exception {
-            runTestWithPackageReplacement("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt", "kotlin.coroutines.experimental");
+            runTest("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt");
-        }
-
-        @TestMetadata("kt18292.kt")
-        public void testKt18292_1_3() throws Exception {
-            runTestWithPackageReplacement("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292.kt", "kotlin.coroutines");
-        }
-
-        @TestMetadata("kt18292_ni.kt")
-        public void testKt18292_ni() throws Exception {
-            runTest("compiler/testData/diagnostics/testsWithStdLib/coroutines/kt18292_ni.kt");
         }
 
         @TestMetadata("kt28658.kt")