Revert "project: make a list from filtered project iterator"

This reverts commit c851664e04.

Parallel updates are a great feature, but they break color.ui and
attempts to fix that have caused unexpected exceptions to be thrown on
Windows, so we need to back the feature out for now until we can get
it done in a way that works with both color and Windows.

Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>

src/west/app/project.py

@@ -1039,9 +1039,9 @@ class Update(_ProjectCommand):
         else:
             projects = self._projects(self.args.projects)
 
-        projects = list(filter(
+        projects = filter(
             lambda p: not isinstance(
-                p, ManifestProject), projects))
+                p, ManifestProject), projects)
 
         (failed, updated) = self.update_project_list(projects)