Update Mercurial repository support to be compatible with Python 3 and remove support for Mercurial < 5.1 (#33784).
Patch by Harald Klimach (Harald Klimach), Olivier Houdas (Olivier Houdas), Jakob Haufe (Jakob Haufe), and Sean Baggaley (Sean Baggaley).
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Update Mercurial repository support to be compatible with Python 3 and remove support for Mercurial < 5.1 (#33784).
Patch by Harald Klimach (Harald Klimach), Olivier Houdas (Olivier Houdas), Jakob Haufe (Jakob Haufe), and Sean Baggaley (Sean Baggaley).