chore: update master to angular version 8 beta (#15392)

This allows us to cherry-pick @kara's static query updates from the
`ivy-2019` branch.

This change includes:
* Adding missing dependencies for various Angular subpackages
* Add umd assets where they are now necessary
* Configure bazel to target ES5 output as a workaround for https://github.com/angular/angular/issues/29107
* Updates most npm dependencies to the @npm// workspace
* Updates general workspace setup, RBE config, ngcontainer
* Update to rxjs 6.4.0 (building from source no longer needed)
* Added rxjs_shims for ts_web_test and ts_devserver targets
* Removed index.bzl and angular_material_setup_workspace (not needed anymore since material won't be built from source)
* Use browser_repositories() from @npm_bazel_karma which have pinned browsers that work on all platforms
* Change dgeni processor functions from arrow function to `function` to
work around `@npm//di` not supporting arrow functions

Co-authored-by: Greg Magolan <gmagolan@gmail.com>

test/BUILD.bazel

@@ -7,9 +7,9 @@ ts_library(
   name = "angular_test_init",
   testonly = True,
   deps = [
-    "@angular//packages/core/testing",
-    "@angular//packages/platform-browser-dynamic/testing",
-    "@matdeps//@types/jasmine",
+    "@npm//@angular/core",
+    "@npm//@angular/platform-browser-dynamic",
+    "@npm//@types/jasmine",
   ],
   # This file *must* end with "spec" in order for ts_web_test to load it.
   srcs = ["angular-test-init-spec.ts"],