Remove evaluator from script definition, simplify interface

libraries/scripting/common/src/kotlin/script/experimental/api/scriptDefinition.kt

@@ -18,8 +18,6 @@ interface ScriptDefinition {
     // constructor(environment: ScriptingEnvironment) // the constructor is expected from implementations
 
     val properties: ScriptDefinitionPropertiesBag
-
-    val evaluator: ScriptEvaluator<*>?
 }
 
 object ScriptDefinitionProperties {

libraries/scripting/common/src/kotlin/script/experimental/api/scriptEvaluation.kt

@@ -24,13 +24,12 @@ typealias ScriptEvaluationEnvironment = ChainedPropertyBag
 
 data class EvaluationResult(val returnValue: Any?, val environment: ScriptEvaluationEnvironment)
 
-// NOTE: name inconsistency: run vs evaluate
-interface ScriptEvaluator<in ScriptBase : Any> {
+interface ScriptEvaluator {
 
     // constructor(properties: ScriptDefinitionPropertiesBag) // the constructor is expected from implementations
 
     suspend fun eval(
-        compiledScript: CompiledScript<ScriptBase>,
+        compiledScript: CompiledScript<*>,
         scriptEvaluationEnvironment: ScriptEvaluationEnvironment
     ): ResultWithDiagnostics<EvaluationResult>
 }