Fix Optimize import for scripts not under source roots

KT-17231 Fixed
KT-21981 Fixed

idea/testData/editor/optimizeImports/jvm/UnusedImportsInScript.kts

@@ -0,0 +1,24 @@
+import com.sun.corba.se.impl.util.JDKBridge
+import com.sun.org.apache.xpath.internal.operations.And
+import java.lang.StringBuilder
+import java.net.HttpRetryException
+import java.util.ArrayList
+import java.util.HashMap
+import kotlin.test.asserter
+import kotlin.test.Asserter
+import kotlin.Charsets
+import kotlin.Assertions
+import kotlin.system.measureTimeMillis
+
+class Action {
+    fun test() {
+        val chs = Charsets.UTF8
+        // val traait : Asserter = asserter
+        val traait : Asserter? = null
+        val objectImport : Assertions? = null
+        measureTimeMillis({ println(HashMap<String, Int>().size()) })
+        val test : ArrayList<Int>? = null
+    }
+}
+
+// RUNTIME

idea/testData/editor/optimizeImports/jvm/UnusedImportsInScript.kts.after

@@ -0,0 +1,16 @@
+import java.util.ArrayList
+import java.util.HashMap
+import kotlin.system.measureTimeMillis
+
+class Action {
+    fun test() {
+        val chs = Charsets.UTF8
+        // val traait : Asserter = asserter
+        val traait : Asserter? = null
+        val objectImport : Assertions? = null
+        measureTimeMillis({ println(HashMap<String, Int>().size()) })
+        val test : ArrayList<Int>? = null
+    }
+}
+
+// RUNTIME