fix: add cluster.kubeconfig field for kubectl console.

[lixd]

Signed-off-by: lixd xueduan.li@gmail.com

What type of PR is this?

/kind bug

What this PR does / why we need it:

fix kubectl console bug.

Which issue(s) this PR fixes:

Fixes #27

Special notes for reviewers:

add kubeconfig to etcd by cluster.kubeconfig field.
when use kubectl console,request kubeconfig from etcd and generate clientset from kubeconfig.
and remove invalid field mgr from handler.

Does this PR introduced a user-facing change?

None

Additional documentation, usage docs, etc.:

[lixd]

/assign @x893675

[x893675]

/cc @qinyer

help review

[x893675]

/lgtm
/approve

[kubeclipper-bot]

LGTM label has been added.

Git tree hash: 487cceff79dc13387d1869233128bdfcfbebf1a5

[kubeclipper-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lixd, x893675

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