Fix the problem of unpublishing and recycling posts by member of post manager

[JohnNiang]

What type of PR is this?

/kind bug
/area core
/milestone 2.0

What this PR does / why we need it:

This PR refines the role template of posts to allow post managers to unpublish and recycle a specific post.

Before that, post managers will be forbidden to unpublishing and recycling posts. You can see the screenshot below:

After that, we can unpublish and recycle posts successfully. You can see the screenshot below:

Special notes for your reviewer:

Steps to test manually:

1. Create a Role with Posts Management permission
2. Create an User with the role bound
3. Login with the User
4. Create a Post and publish it
5. Unpublish the post and Recycle it

Does this PR introduce a user-facing change?

修复无法“取消发布”和“删除”文章的错误

[ruibaby]

/lgtm

[guqing]

/approve

[f2c-ci-robot]

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