[FIR TEST] Add CLI test with should-be-error (not yet)

compiler/testData/cli/jvm/firError.args

@@ -0,0 +1,4 @@
+$TESTDATA_DIR$/firError.kt
+-Xuse-fir
+-d
+$TEMP_DIR$

compiler/testData/cli/jvm/firError.kt

@@ -0,0 +1,6 @@
+fun println(val x: Int) {}
+
+fun main() {
+    val x: Int
+    println(x)
+}

compiler/testData/cli/jvm/firError.out

@@ -0,0 +1 @@
+OK

compiler/tests/org/jetbrains/kotlin/cli/CliTestGenerated.java

@@ -275,6 +275,11 @@ public class CliTestGenerated extends AbstractCliTest {
             runTest("compiler/testData/cli/jvm/fileClassClashMultipleFiles.args");
         }
 
+        @TestMetadata("firError.args")
+        public void testFirError() throws Exception {
+            runTest("compiler/testData/cli/jvm/firError.args");
+        }
+
         @TestMetadata("firHello.args")
         public void testFirHello() throws Exception {
             runTest("compiler/testData/cli/jvm/firHello.args");