refactor(core): break i18n.ts into smaller files (angular#38368)

This commit contains no changes to code. It only breaks `i18n.ts` file
into `i18n.ts` + `i18n_apply.ts` + `i18n_parse.ts` +
`i18n_postprocess.ts` for easier maintenance.

PR Close angular#38368

Author: mhevery

goldens/circular-deps/packages.json

@@ -1758,9 +1758,10 @@
     "packages/core/src/render3/index.ts"
   ],
   [
-    "packages/core/src/render3/i18n.ts",
+    "packages/core/src/render3/i18n/i18n_apply.ts",
     "packages/core/src/render3/interfaces/type_checks.ts",
-    "packages/core/src/render3/index.ts"
+    "packages/core/src/render3/index.ts",
+    "packages/core/src/render3/instructions/i18n.ts"
   ],
   [
     "packages/core/src/render3/interfaces/container.ts",

goldens/size-tracking/integration-payloads.json

@@ -62,7 +62,7 @@
         "bundle": "TODO(i): we should define ngDevMode to false in Closure, but --define only works in the global scope.",
         "bundle": "TODO(i): (FW-2164) TS 3.9 new class shape seems to have broken Closure in big ways. The size went from 169991 to 252338",
         "bundle": "TODO(i): after removal of tsickle from ngc-wrapped / ng_package, we had to switch to SIMPLE optimizations which increased the size from 252338 to 1198917, see PR#37221 and PR#37317 for more info",
-        "bundle": 1213769
+        "bundle": 1214317
       }
     }
   }

packages/core/src/application_module.ts

@@ -21,7 +21,7 @@ import {ComponentFactoryResolver} from './linker';
 import {Compiler} from './linker/compiler';
 import {NgModule} from './metadata';
 import {SCHEDULER} from './render3/component_ref';
-import {setLocaleId} from './render3/i18n';
+import {setLocaleId} from './render3/i18n/i18n_locale_id';
 import {NgZone} from './zone';
 
 declare const $localize: {locale?: string};

packages/core/src/application_ref.ts

@@ -30,7 +30,7 @@ import {InternalViewRef, ViewRef} from './linker/view_ref';
 import {isComponentResourceResolutionQueueEmpty, resolveComponentResources} from './metadata/resource_loading';
 import {assertNgModuleType} from './render3/assert';
 import {ComponentFactory as R3ComponentFactory} from './render3/component_ref';
-import {setLocaleId} from './render3/i18n';
+import {setLocaleId} from './render3/i18n/i18n_locale_id';
 import {setJitOptions} from './render3/jit/jit_options';
 import {NgModuleFactory as R3NgModuleFactory} from './render3/ng_module_ref';
 import {publishDefaultGlobalUtils as _publishDefaultGlobalUtils} from './render3/util/global_utils';