fix(bazel): ng_package packages attr not forwarded to npm_package (#22967)

PR Close #22967

packages/bazel/test/ng_package/example/BUILD.bazel

@@ -1,6 +1,7 @@
 package(default_visibility = ["//packages/bazel/test:__subpackages__"])
 
 load("//packages/bazel:index.bzl", "ng_module", "ng_package")
+load("//tools:defaults.bzl", "npm_package")
 
 ng_module(
     name = "example",
@@ -21,6 +22,9 @@ ng_package(
         ":extra-styles.css",
     ],
     entry_point = "packages/bazel/test/ng_package/example/index.js",
+    packages = [
+        ":arbitrary_npm_package",
+    ],
     deps = [
         ":example",
         "//packages/bazel/test/ng_package/example/secondary",
@@ -43,3 +47,8 @@ genrule(
     cmd = "echo World > $@",
     output_to_bindir = True,
 )
+
+npm_package(
+    name = "arbitrary_npm_package",
+    srcs = [":arbitrary-npm-package-main.js"],
+)

packages/bazel/test/ng_package/example/arbitrary-npm-package-main.js

@@ -0,0 +1,9 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+const x = 1;

packages/bazel/test/ng_package/example_package.golden

@@ -1,3 +1,4 @@
+arbitrary-npm-package-main.js
 arbitrary_bin.txt
 arbitrary_genfiles.txt
 bundles
@@ -68,6 +69,11 @@ secondary
 secondary.d.ts
 secondary.metadata.json
 some-file.txt
+--- arbitrary-npm-package-main.js ---
+
+const x = 1;
+
+
 --- arbitrary_bin.txt ---
 
 World