Add userid versions of `rvuser` and `rvexcludeuser`
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Description

Also the equivalent parameters in ApiQueryAllDeletedRevisions, ApiQueryAllRevisions, ApiQueryDeletedRevisions, ApiQueryDeletedrevs, ApiQueryRecentChanges, ApiQueryWatchlist, and possibly ApiFeedWatchlist.

If we can think of a good syntax (maybe "#12345"?) it might be easier to make the API 'user' type be able to handle it directly.