Add tests for script configuration machinery, namely ScriptTemplateProvider EP

Test highlighting and navigation depending on provided script definition

idea/testData/script/definition/highlighting/customLibrary/lib/lib.kt

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+package custom.library
+
+class C()
+
+fun doStuff(c1: C, c2: C) {}

idea/testData/script/definition/highlighting/customLibrary/script.kts

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+val c1 = C()
+
+val c2 = C()
+
+doStuff(c1, c2)
+
+doStuff(c1, <error>3</error>)
+

idea/testData/script/definition/highlighting/customLibrary/template/template.kt

@@ -0,0 +1,27 @@
+package custom.scriptDefinition
+
+import org.jetbrains.kotlin.script.*
+import java.io.File
+import java.util.concurrent.CompletableFuture
+import java.util.concurrent.Future
+
+class TestDependenciesResolver : ScriptDependenciesResolver {
+    override fun resolve(
+            script: ScriptContents,
+            environment: Map<String, Any?>?,
+            report: (ScriptDependenciesResolver.ReportSeverity, String, ScriptContents.Position?) -> Unit, previousDependencies: KotlinScriptExternalDependencies?
+    ): Future<KotlinScriptExternalDependencies?> {
+        return CompletableFuture.completedFuture(
+                object : KotlinScriptExternalDependencies {
+                    override val classpath: Iterable<File> = listOf(
+                            environment?.get("lib-classes") as File
+                    )
+
+                    override val imports: Iterable<String> = listOf("custom.library.*")
+                })
+
+    }
+}
+
+@ScriptTemplateDefinition(TestDependenciesResolver::class, scriptFilePattern = "script.kts")
+class Template