D3562: tests: mark tests that fail when using chg as #require no-chg

[Yuya Nishihara]

Queued, thanks.

> REVISION SUMMARY
>   As far as I can tell, most of these failures are due to using $HGPORT, which it
>   seems chg might be using itself? I don't know enough to debug these failures to
>   fix them properly.

Perhaps some "chg serve -d" calls would bypass the hack to execute
"hg serve -d" instead. Daemon processes can't be spawned from command server.

https://www.mercurial-scm.org/repo/hg/file/4.6/contrib/chg/chg.c#l363