tests: Disable for rhg remaining tests that fail in that mode
These cases are in features not yet implemented by rhg
for which triggering a fallback is not practical.
Disabling some tests allows us to reach passing CI and catch
any future regression in the rest of the tests.
Differential Revision: https://phab.mercurial-scm.org/D10190
#require execbit
$ hg init repo
$ cd repo
$ echo foo > foo
$ chmod 644 foo
$ hg ci -qAm '644'
$ chmod 755 foo
$ hg ci -qAm '755'
reverting to rev 0
$ hg revert -a -r 0
reverting foo
$ hg st
M foo
$ hg diff --git
diff --git a/foo b/foo
old mode 100755
new mode 100644
$ cd ..