scm: mercurial: split Repository::Mercurial#latest_changesets_cond for short and long id (#14361)

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extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012751
scm: mercurial: use long id in adapter level (#14361)

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012752