[Bug 50658] New: The Special Jobs page does not take MissionCaps into account

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50658

Bug ID: 50658
           Summary: The Special Jobs page does not take MissionCaps into
                    account
           Product: Wine-Testbot
           Version: unspecified
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

A lot of Windows VM configurations have the following:
  Role=base|winetest
  Missions=exe64
  MissionCaps=exe32

These VMs typically mirror a base VM for which we already run both 32- and
64-bit WineTest daily. Since these configurations typically only differ in the
locale, running both bitnesses again would be redundant. So the above results
in only the 64-bit WineTest being run, but still allows developers to submit
32-bit jobs if desired (e.g. if they want to run a 32-bit binary).

But this configuration throws the "Special Jobs" page off and causes it to
create an empty job when trying to run the 32-bit WineTest.
It should really see that MissionCaps allows running 32-bit tests. However the
issue comes from the shared AddWindowsTestJob() function: it should take
MissionCaps into account without changing the behavior of
CheckForWinetestUpdate.pl.