tests: fix the flaky test test-logtoprocess.t
The main change is that we're waiting for the [touched] file to appear for 5 seconds instead of 0.1 seconds. Also, instead of implementing wait-on-file from scratch, we use the existing one from testlib/ that works well.
[templates]
ldate = '{label("log.date",
"{date|isodate}")}'
ldesc = '{label('ui.note log.description',
'{desc|strip}')}'
ldescfirst = '{label('ui.note log.description',
'{desc|firstline|strip}')}'
changeset = '{lrev}{tags}{bookmarks}{parents} {lnode} {ldate} {luser}\n {ldescfirst}\n\n'
changeset_quiet = '{lrev}:{lnode}\n'
changeset_verbose = '{lrev}{tags}{parents} {lnode} {ldate} {lauthor}\n {ldesc}\n\n'
lrev = '{label("log.changeset changeset.{phase}",
"{rev}")}'
lnode = '{label("log.node",
"{node|short}")}'
lauthor = '{label("log.user",
"{author}")}'
luser = '{label("log.user",
"{author|user}")}'
start_tags = '['
tag = '{label("log.tag",
"{tag},")}'
last_tag = '{tag}]'
start_parents = ':'
parent = '{lrev},'
last_parent = '{lrev}'
start_bookmarks = '['
bookmark = '{label("log.bookmark",
"{bookmark},")}'
last_bookmark = '{bookmark}]'