Scripting: improve reporting on cyclic dependency

#KT-48177 fixed
the issue is in fact fixed by the previous commit (report error
on duplicated import) by normalizing import path before processing,
but here we're making error reporting nicer for the case.

libraries/tools/kotlin-main-kts-test/test/org/jetbrains/kotlin/mainKts/test/mainKtsTest.kt

@@ -127,6 +127,12 @@ class MainKtsTest {
         assertFailed("Duplicate imports:", res)
     }
 
+    @Test
+    fun testCyclicImportError() {
+        val res = evalFile(File("$TEST_DATA_ROOT/import-cycle-1.main.kts"))
+        assertFailed("Unable to handle recursive script dependencies", res)
+    }
+
     @Test
     fun testCompilerOptions() {
 

libraries/tools/kotlin-main-kts-test/testData/import-cycle-1.main.kts

@@ -0,0 +1,4 @@
+
+@file:Import("import-cycle-2.main.kts")
+
+1

libraries/tools/kotlin-main-kts-test/testData/import-cycle-2.main.kts

@@ -0,0 +1,4 @@
+
+@file:Import("import-cycle-1.main.kts")
+
+2