refactor(bazel): convert most ts_library to ng_module (#22176)

This is necessary so we can produce ng metadata for our packages that are published as libraries

PR Close #22176

packages/platform-browser-dynamic/testing/BUILD.bazel

@@ -1,8 +1,8 @@
 package(default_visibility = ["//visibility:public"])
 
-load("//tools:defaults.bzl", "ts_library")
+load("//tools:defaults.bzl", "ng_module")
 
-ts_library(
+ng_module(
     name = "testing",
     testonly = 1,
     srcs = glob(["**/*.ts"]),