Update NamespaceEdits metric

* Make the namespace parameter include all namespaces if left blank
* Make a new parameter "Include Deleted" that counts revisions made on
  deleted pages (looking at the archive table)
* Update corresponding labeling, UI, and tests

Bug: 71008

Change-Id: I4f076885fa69f4d1fc151c7b02eaab435fc8fae4
Merge "Update NamespaceEdits metric"