[feature request]add LogPath field to the output of pouch inspect

[flyer103]

Ⅰ. Issue Description

Aliyun SLS could use logtail to collect docker containers' stdout/stderr logs.
logtail uses docker inspect to get the path of stdout/stderr log through LogPath field and then collects logs on the host machine.
For pouch container, pouch inspect doesn't offer the LogPath field like docker. This results in logtail failing to collect pouch containers' stdout/stderr logs.

Ⅱ. Describe what happened

logtail couldn't collect pouch containers' stdout/stderr logs.

Ⅲ. Describe what you expected to happen

pouch inspect offers the LogPath field to indicate the path of stdout/stderr logs.
And then logtail could collect pouch containers' stdout/stderr logs.

Ⅳ. How to reproduce it (as minimally and precisely as possible)

1. Deploy logtail container to collect pouch containers' stdout/stderr logs following the doc

[pouchrobot]

Thanks for your report, @flyer103
😱 This is a priority/P1 issue which is highest.
Seems to be severe enough.
ping @alibaba/pouch , PTAL.