[refactor] The code related to CRI has a lot of redundancy

[starnop]

Ⅰ. Issue Description

For compatibility with the two versions of kubernetes CRI, we have maintained two pieces of code temporarily. Now it is time to optimize it. Actually, we have to maintain two pieces of code to some extent, but we can extract the common part to reduce redundancy. It is necessary even will take a lot of effort.

Ⅱ. Describe what happened

as above

Ⅲ. Describe what you expected to happen

reduce the code redundancy

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

None

Ⅴ. Anything else we need to know?

Ⅵ. Environment:

• pouch version (use pouch version):
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

[starnop]

I will do that！

[allencloud]

Any update on this?

[starnop]

@allencloud Yes, the code about Stream and CNI has been refactored. More work will be done later.