[Language] Convert local type aliases to experimental feature and fix its flags

Author: KvanTTT

compiler/testData/diagnostics/tests/typealias/topLevelTypeAliasesOnly.diag.txt

@@ -1,15 +1,16 @@
-/topLevelTypeAliasesOnly.kt:7:5: error: nested and local type aliases are not supported
+/topLevelTypeAliasesOnly.kt:8:5: error: nested and local type aliases are not supported
     typealias Nested = Any
     ^^^^^^^^^^^^^^^^^^^^^^
-/topLevelTypeAliasesOnly.kt:11:5: error: nested and local type aliases are not supported
+/topLevelTypeAliasesOnly.kt:12:5: error: nested and local type aliases are not supported
     typealias Nested = Any
     ^^^^^^^^^^^^^^^^^^^^^^
-/topLevelTypeAliasesOnly.kt:13:9: error: nested and local type aliases are not supported
+/topLevelTypeAliasesOnly.kt:14:9: error: nested and local type aliases are not supported
         typealias Nested = Any
         ^^^^^^^^^^^^^^^^^^^^^^
-/topLevelTypeAliasesOnly.kt:15:13: error: nested and local type aliases are not supported
+/topLevelTypeAliasesOnly.kt:16:13: error: nested and local type aliases are not supported
             typealias LocalInMember = Any
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-/topLevelTypeAliasesOnly.kt:21:5: error: nested and local type aliases are not supported
+/topLevelTypeAliasesOnly.kt:22:5: error: nested and local type aliases are not supported
     typealias Local = Any
     ^^^^^^^^^^^^^^^^^^^^^
+

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

@@ -477,7 +477,6 @@ enum class LanguageFeature(
     JsAllowExportingSuspendFunctions(sinceVersion = KOTLIN_2_4, "KT-56281"),
     ForbidTypeAliasToCompilerRequiredAnnotation(KOTLIN_2_4, enabledInProgressiveMode = true, "KT-79369"),
     ForbidArrayLiteralsInNonAnnotationContexts(KOTLIN_2_4, enabledInProgressiveMode = true, "KTLC-369"),
-    LocalTypeAliases(sinceVersion = KOTLIN_2_4, enabledInProgressiveMode = true, "KT-81404"),
     ForbidClassLiteralWithPotentiallyNullableReifiedLhs(KOTLIN_2_4, enabledInProgressiveMode = true, "KT-81385"),
 
     // 2.5
@@ -543,6 +542,7 @@ enum class LanguageFeature(
     NameBasedDestructuring(sinceVersion = null, "KT-19627"),
     DeprecateNameMismatchInShortDestructuringWithParentheses(sinceVersion = null, "KT-19627"),
     EnableNameBasedDestructuringShortForm(sinceVersion = null, "KT-19627"),
+    LocalTypeAliases(sinceVersion = null, forcesPreReleaseBinaries = true, issue = "KT-81404"),
 
     // K1 support only. We keep it, as we may want to support it also in K2
     UnitConversionsOnArbitraryExpressions(sinceVersion = null, NO_ISSUE_SPECIFIED),