build(bazel): turn on preserve-symlinks (#24881)

This change turns on preserve-symlinks in nodejs to verify hermeticity of the Angular build.

BREAKING CHANGE: Use of @angular/bazel rules now requires calling ng_setup_workspace() in your WORKSPACE file.

For example:

local_repository(
    name = "angular",
    path = "node_modules/@angular/bazel",
)

load("@angular//:index.bzl", "ng_setup_workspace")

ng_setup_workspace()

PR Close #24881

integration/bazel/WORKSPACE

@@ -81,3 +81,11 @@ local_repository(
     name = "rxjs",
     path = "node_modules/rxjs/src",
 )
+
+#
+# Load and install our dependencies from local repositories
+#
+
+load("@angular//:index.bzl", "ng_setup_workspace")
+
+ng_setup_workspace()