Add new node "Package Statuses" to manual

* doc/emacs/emacs.texi (Top):
* doc/emacs/package.texi (Package Menu): New node "Package
Statuses".  (Bug#29420)
1 job for emacs-27 in 54 minutes and 3 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #4756
test-all

00:54:03