build: rename //:node_modules to root modules

In our dev-infra sync we decided that we want to have less
ambiguous naming for node modules from the workspace root vs. node
modules that are local to the package.

Consider the confusion between: `//:node_modules` and `:node_modules`.
This commit fixes this by naming the workspace `node_modules` as
`:root_modules`. This does not have an effect on runtime of NodeJS
output because `rules_js` continues to lay out the root modules as
`/node_modules` folder; as it should.

BUILD.bazel

@@ -23,15 +23,15 @@ exports_files([
 ])
 
 npm_link_all_packages(
-    name = "node_modules",
+    name = "root_modules",
 )
 
 rules_js_tsconfig(
     name = "build-tsconfig",
     src = "tsconfig-build.json",
     deps = [
         "tsconfig.json",
-        "//:node_modules/@types/node",
+        "//:root_modules/@types/node",
     ],
 )
 
@@ -40,7 +40,7 @@ rules_js_tsconfig(
     src = "tsconfig-test.json",
     deps = [
         "tsconfig.json",
-        "//:node_modules/@types/node",
+        "//:root_modules/@types/node",
     ],
 )
 

packages/angular_devkit/architect/BUILD.bazel

@@ -70,8 +70,8 @@ ts_project(
     ],
     module_name = "@angular-devkit/architect",
     deps = [
-        "//:node_modules/@types/node",
-        "//:node_modules/rxjs",
+        "//:root_modules/@types/node",
+        "//:root_modules/rxjs",
     ],
 )
 
@@ -84,8 +84,8 @@ ts_project(
     ],
     deps = [
         ":architect_rjs",
-        "//:node_modules/@types/jasmine",
-        "//:node_modules/rxjs",
+        "//:root_modules/@types/jasmine",
+        "//:root_modules/rxjs",
         "//packages/angular_devkit/architect/testing:testing_rjs",
     ],
 )

packages/angular_devkit/architect/testing/BUILD.bazel

@@ -22,7 +22,7 @@ ts_project(
     ],
     module_name = "@angular-devkit/architect/testing",
     deps = [
-        "//:node_modules/@types/node",
-        "//:node_modules/rxjs",
+        "//:root_modules/@types/node",
+        "//:root_modules/rxjs",
     ],
 )