scm: mercurial: split latest_changesets tag test with path or not (#14361)

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012764
scm: mercurial: split latest_changesets default branch test to sub method (#14361)

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012765
scm: mercurial: split latest_changesets tag test to sub method (#14361)

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012766