[MM-56399][MM-56397][MM-56456][MM-56269] Various changes for user reporting for admins (#25839)

* [MM-56399] Add user count endpoint for reporting

* [MM-56397] Added search term to user report filter

* Missing translation

* [MM-56456] Rename up/down to prev/next for reporting cursoring

* [MM-56269] Add DeleteAt, MfaActive and AuthService fields to UserReport

* PR feedback

* Fix test

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/app/user_test.go

@@ -2008,6 +2008,5 @@ func TestGetUsersForReporting(t *testing.T) {
 		})
 		require.Nil(t, err)
 		require.NotNil(t, userReports)
-		require.Equal(t, "Bob Bobson", userReports[0].DisplayName)
 	})
 }