bug(adoptium): fix rpm url for ustc

[ZenithalHourlyRate]

TUNA uses yum-sync.py which does not preserve the original path; whereas USTC uses lftp

• https://mirrors.help/Adoptium/
• https://mirrors.tuna.tsinghua.edu.cn/Adoptium/rpm/centos7-x86_64/
• https://mirrors.ustc.edu.cn/adoptium/rpm/centos/

There are two ways to fix it

• add another section for ustc
• change tuna yum-sync script (already proposed in https://github.com/tuna/issues/issues/1101)

[ZenithalHourlyRate]

• change tuna yum-sync script (already proposed in 请求设置MySQL yum 源的镜像目录结构和上游一样 tuna/issues#1101)

Actually, this applies to all help doc from TUNA that mentioned rpm URL

[taoky]

For adoptium syncing, we are not using lftp. Instead we use a modified yum-sync.py to keep the structure same as upstream.

[ZenithalHourlyRate]

@taoky can it be upstreamed?

[taoky]

@taoky can it be upstreamed?

It's implemented by allowing working_dir to be processed by substitute_vars(). I'm not sure how to backport this feature as there're other changes within this script.

https://github.com/ustclug/ustcmirror-images/blob/master/yum-sync/tunasync/yum-sync.py

[ZenithalHourlyRate]

@taoky I'll check that