refactor(@angular-devkit/architect): fix dependencies and import paths for strict deps requirements

Author: josephperrott

packages/angular_devkit/architect/testing/BUILD.bazel

@@ -15,14 +15,11 @@ ts_project(
         include = ["**/*.ts"],
         exclude = ["**/*_spec.ts"],
     ),
-    # TODO: Fix strict_deps failure
-    ignore_strict_deps = True,
     module_name = "@angular-devkit/architect/testing",
     deps = [
         "//:node_modules/@types/node",
         "//:node_modules/rxjs",
         "//packages/angular_devkit/architect:architect_rjs",
-        "//packages/angular_devkit/core:core_rjs",
-        "//packages/angular_devkit/core/node:node_rjs",
+        "//packages/angular_devkit/architect:node_modules/@angular-devkit/core",
     ],
 )