fzf: Fix shell directory for archlinux package (#7119)
fzf: Fix shell directory for archlinux package (#7119)

* fzf: Fix shell directory for archlinux package

* fzf: Don't clutter PATH if fzf already available

* brew has it available via symlink in /usr/local/bin
* Fedora and Arch packages have it place in /usr/bin

* fzf: Fix archlinux guess by using release file

* fzf: unset leftover variables

tekniklr/oh-my-zsh,tekniklr/oh-my-zsh