python-contextvars from home:ojkastl_buildservice:Patroni project

需要 15.4 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Patroni/15.4/home:ojkastl_buildservice:Patroni.repo
zypper refresh
zypper install python-contextvars