feat(bazel): change ng_package rule to APF v6 (#22782)

Angular Package Format v6 stops bundling files in the esm5 and esm2015
directories, now that Webpack 4 can tree-shake per-file.

Adds some missing files like package.json to make packages closer to
what we publish today.

Refactor ng_package to be a type of npm_package and re-use the packaging
action from that rule.

PR Close #22782

packages/compiler-cli/BUILD.bazel

@@ -1,5 +1,6 @@
 package(default_visibility = ["//visibility:public"])
 
+load("//tools:defaults.bzl", "npm_package")
 load("@build_bazel_rules_typescript//:defs.bzl", "ts_library", "ts_config")
 
 ts_config(
@@ -16,7 +17,6 @@ ts_library(
             "src/**/*.ts",
         ],
         exclude = [
-            "src/extract_i18n.ts",
             "src/integrationtest/**/*.ts",
         ],
     ),
@@ -27,3 +27,11 @@ ts_library(
         "//packages/compiler",
     ],
 )
+
+npm_package(
+    name = "npm_package",
+    srcs = [
+        "package.json",
+    ],
+    deps = [":compiler-cli"],
+)