[Features] Introduce ExplicitContextArguments as testOnly

#KT-81684

Author: cypressious

compiler/util/src/org/jetbrains/kotlin/config/LanguageVersionSettings.kt

@@ -538,6 +538,7 @@ enum class LanguageFeature(
     FunctionalTypeWithExtensionAsSupertype(sinceVersion = null, NO_ISSUE_SPECIFIED),
     ContextReceivers(sinceVersion = null, NO_ISSUE_SPECIFIED),
     ContextParameters(sinceVersion = null, "KT-72222"),
+    ExplicitContextArguments(sinceVersion = null, issue = "KT-81684", testOnly = true),
     ValueClasses(sinceVersion = null, forcesPreReleaseBinaries = true, issue = NO_ISSUE_SPECIFIED),
     JavaSamConversionEqualsHashCode(sinceVersion = null, forcesPreReleaseBinaries = true, issue = NO_ISSUE_SPECIFIED),
     PropertyParamAnnotationDefaultTargetMode(sinceVersion = null, "KT-73255"),