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/stdlibWithSources/script.kts

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