feat: Refactor Route publish and offline

[liuxiran]

Please answer these questions before submitting your issue.

• Why do you submit this issue?
• Feature or performance improvement

Refer to:
#611
#437

Refactor:

• APISIX implement Route publish/offline status in dp (issue: Proposal: Support enable/disable route apisix#2737)

• manager-api provides an interface to write data to etcd

• fe add publish and offline button to every route item list table, at the same time, create route also need to add a publish form item.

[juzhiyuan]

cc @nic-chen

[nic-chen]

LGTM

[juzhiyuan]

Then do we have a final plan? dev, due date, and so on.

[LiteSun]

I think this issue should be kept in sync with the apisix (issue: apache/apisix#2737) milestone.

[moonming]

This PR is in 2.2 milestone, and Apache APISIX supports it in apache/apisix#2943

[moonming]

What is the progress in dashboard? @liuxiran @nic-chen

[membphis]

this feature depends on apache/apisix#2943

we need to release a new version of APISIX. so I want to change the milestone to 2.3

@liuxiran @nic-chen please confirm if this is ok ^_^

[liuxiran]

this feature depends on apache/apisix#2943

we need to release a new version of APISIX. so I want to change the milestone to 2.3

@liuxiran @nic-chen please confirm if this is ok ^_^

ok, and related pr for fe and manager-api will be created as a draft later this week.

[LiteSun]

Just for reminder: apache/apisix#2943 is merged. cc @liuxiran