[LL FIR] implement diagnostic tests on custom script definitions

it is impossible to declare test data with another output yet
as `myScriptFile.test.ll.kts` won't be treated as custom definition as
it requires `test.kts` extension.

^KT-66232 Fixed
^KT-66276

analysis/analysis-api-impl-base/tests/org/jetbrains/kotlin/analysis/api/impl/base/test/configurators/AnalysisApiScriptTestServiceRegistrar.kt

@@ -12,7 +12,7 @@ import org.jetbrains.kotlin.scripting.definitions.ScriptDefinitionProvider
 import org.jetbrains.kotlin.test.services.TestServices
 
 object AnalysisApiScriptTestServiceRegistrar : AnalysisApiTestServiceRegistrar() {
-    override fun registerProjectModelServices(project: MockProject, testServices: TestServices) {
+    override fun registerProjectServices(project: MockProject, testServices: TestServices) {
         project.registerService(ScriptDefinitionProvider::class.java, CliScriptDefinitionProvider())
     }
 }