AbstractScriptConfigurationTest: rewrite script template setup

Allow simpler setup of common scenarios
Do not require to define DependenciesResolver for every test
Drop redundant template files

idea/testData/script/definition/navigation/stdlib/script.kts

@@ -1,4 +1,6 @@
 val g = lis<caret>tOf("a", "b", "c")
 
+// DEPENDENCIES: classpath:runtime-classes
+
 // REF: (kotlin.collections).listOf(vararg T)
 // FILE: collections/CollectionsKt.class

idea/testData/script/definition/navigation/stdlib/template/template.kt

@@ -1,24 +0,0 @@
-package custom.scriptDefinition
-
-import kotlin.script.dependencies.*
-import kotlin.script.templates.*
-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("runtime-classes") as File)
-                })
-
-    }
-}
-
-@ScriptTemplateDefinition(TestDependenciesResolver::class, scriptFilePattern = "script.kts")
-class Template