refactor(core): add noSideEffects() as private export (#38320)

This is to enable the compiler to generate `noSideEffects()` calls. This is a private export, gated by `ɵ`.

PR Close #38320

packages/core/src/core_render3_private_export.ts

@@ -292,5 +292,8 @@ export {
   ɵɵsanitizeUrl,
   ɵɵsanitizeUrlOrResourceUrl,
 } from './sanitization/sanitization';
+export {
+  noSideEffects as ɵnoSideEffects,
+} from './util/closure';
 
 // clang-format on

packages/core/src/r3_symbols.ts

@@ -28,6 +28,7 @@ export {ɵɵdefineNgModule} from './render3/definition';
 export {ɵɵFactoryDef} from './render3/interfaces/definition';
 export {setClassMetadata} from './render3/metadata';
 export {NgModuleFactory} from './render3/ng_module_ref';
+export {noSideEffects as ɵnoSideEffects} from './util/closure';