fix(ivy): correctly export all *Def symbols as private (#24862)

Previously, some of the *Def symbols were not exported or were exported
as public API. This commit ensures every definition type is in the
private export namespace.

PR Close #24862

packages/compiler-cli/src/ngtsc/transform/src/translator.ts

@@ -43,7 +43,7 @@ const CORE_SUPPORTED_SYMBOLS = new Set<string>([
   'defineInjector',
   'ɵdefineNgModule',
   'inject',
-  'InjectableDef',
+  'ɵInjectableDef',
   'ɵInjectorDef',
   'ɵNgModuleDef',
 ]);