logcmdutil: use the same data as {file*} template keywords (issue6642)
Since 0c72eddb4be5 template keywords that show files use a different source of
data than ctx.p1().status(ctx). These two functions in logcmdutil also show
file lists when needed (e.g. log with --debug flag), but previously they used
the old way of just looking at status compared to p1 and it resulted in
differences between e.g. hg log --debug and hg log -T '{file*}'.
test-phases.t needs an adjustment because 7 is a merge commit of two
topological branches and one of them introduces files C, D and E.
#if no-windows no-osx
$ mkdir -p xdgconf/hg
$ echo '[ui]' > xdgconf/hg/hgrc
$ echo 'username = foobar' >> xdgconf/hg/hgrc
$ XDG_CONFIG_HOME="`pwd`/xdgconf" ; export XDG_CONFIG_HOME
$ unset HGRCPATH
$ hg config ui.username 2>/dev/null
foobar
#endif